Welcome to the USCRA Tech

 The USCRA has a vast database of knowledge due to the racers, volunteers and builders that work together to get themselves and each other on the track.  From Art Stapleton, Pete Talabach, Todd Henning, Giannini to Ray Bennett, we are here to help you get your bike on the track.
 

  We have compiled these reference charts and tech tips for the beginner and veteran race members.  If you have a tip or chart you would like to share with the USCRA contact us we will gladly post it for you.

Tech Tips & Reference Charts

Wire Tie Your Bike

Imperial/Whitworth to Metric Conversion

METRIC TAP DRILL SIZES

METRIC TORQUE VALUES - METRIC SYSTEM

Motorcycle Spark Plug Cross Reference

Keihin vs. Mikuni jet size Comparison Chart

Chain Size Chart

Motorcycle Tire Size Conversion Chart

Scitsu Tacho Guide

• Wire Tie Your Bike

  

    1.   Safety wiring of critical components mandatory. Wire manufactured for the purpose of lock wiring must be used. Stainless steel type with a diameter of 0.025”-0.032”recommended. .020” safety wire on large parts is prohibited.
  2.  Anything that holds fluid in should be lock wired, for example: oil filler, level plugs, line bore plugs, oil filter bolts and drains, external oil lines and oil drains, covers with only 2 or 3 securing screws. External oil filters (spin on types) must be clamped with a hose clamp and securely safety wired to ensure they cannot spin off.
   Read More about Wire safety in section 4.6 Motorcycle Safety Requirements of the Rule book

   

• Imperial/Whitworth to Metric Conversion

  

   This Chart was put together for the USCRA members as easy access to the whitworth conversion chart. see Section 11.3 in the Rule book for more reference charts

  Imperial/Whitworth Size	Nearest metric	Equivalent Difference
  5/32 AF	4mm	.001” larger
  13/64 AF	5mm	.006” smaller
  15/64 AF	6mm	.002” larger
  9/32 AF	7mm	.005” smaller
  5/16 AF	8mm	.003” larger
  11/32 AF	9mm	.011” larger
  7/16 AF	11mm	.004” smaller
  1/4 BSW	11mm	.012” smaller
  15/32 AF	12mm	.003” larger
  1/2 AF	13mm	.012” larger
  9/16 AF	14mm	.011” smaller
  19/32 AF	15mm	.002” smaller
  3/8 BSW	15mm	.009” smaller
  5/8 AF	16mm	.005” larger
  3/4 AF	19mm	.002” smaller
  13/16 AF	21mm	.014” larger
  1/2 BSW	21mm	.007” larger
  7/8 AF	22mm	.009” smaller
  15/16 AF	24mm	.007” larger
  1” AF	25mm	.016” smaller
  5/8 BSW	26mm	.014” larger
  11/16 BSW	28mm	.002” larger
  1.1/8 AF	29mm	.016” larger
  1.3/16 AF	30mm	.006” smaller
  3/4 BSW	31mm	.020” larger
  1.1/4 AF	32mm	.009” larger
  1.5/16 AF	33mm	.013” smaller
  1.3/8 AF	35mm	.002” larger
  1.7/16 AF	36mm	.020” smaller
  1” BSW	38mm	.016” larger

• 

  Metric Tap Drill Sizes

   This Chart has the recommended tap drill sizes (for approx. 75% thread) . the chart contains both coarse and fine metric thread sizes.

  Metric Coarse Sizes		Metric Fine Sizes
  Tap size	Drill Size	Tap Size	Drill Size
  1mm x .25	.75mm	4 mm x .35	3.6mm
  1.1 x .25	0.85	4 x .5	3.5
  1.2 x .25	0.95	5 x .5	4.5
  1.4 x .3	1.1	6 x .5	5.5
  1.6 x .35	1.25	6 x .75	5.25
  1.7 x .35	1.3	7 x .75	6.25
  1.8 x .35	1.45	8 x .5	7.5
  2 x .4	1.6	8 x .75	7.25
  2.2 x .45	1.75	8 x 1	7
  2.5 x .45	2.05	9 x 1	8
  3 x .5	2.5	10 x .75	9.25
  3.5 x .6	2.9	10 x 1	9
  4 x .7	3.3	10 x 1.25	8.8
  4.5 x .75	3.7	11 x 1	10
  5 x .8	4.2	12 x .75	11.25
  6 x 1	5	12 x 1	11
  7 x 1	6	12 x 1.5	10.5
  8 x 1.25	6.8	14 x 1	13
  9 x 1.25	7.8	14 x 1.25	12.8
  10 x 1.5	8.5	14 x 1.5	12.5
  11 x 1.5	9.5	16 x 1	15
  12 x 1.75	10.2	16 x 1.5	14.5
  14 x 2	12	18 x 1	17
  16 x 2	14	18 x 2	16
  18 x 2.5	15.5	20 x 1	19
  20 x 2.5	17.5	20 x 1.5	18.5
  22 x 2.5	19.5	20 x 2	18
  24 x 3	21	22 x 1	21
  27 x 3	24	22 x 1.5	20.5
  30 x 3.5	26.5	22 x 2	20
  33 x 3.5	29.5	24 x 1.5	22.5
  36 x 4	32	24 x 2	22
  39 x 4	35	26 x 1.5	24.5
  		27 x 1.5	25.5
  		27 x 2	25
  		28 x 1.5	26.5
  		30 x 1.5	28.5
  		30 x 2	28
  		33 x 2	31
  		36 x 3	33
  		39 x 3	36

• METRIC TORQUE VALUES - METRIC SYSTEM

  

   In the absence of specific torque values, the following chart can be used as a guide to the maximum safe torque for a particular size/grade of fastener. There is no torque difference for fine or coarse threads. Torque values are based on clean, dry threads. Reduce value by 10% if threads are oiled before assembly.

  Bolt Spec.	4.6			4.8			5.8
  Dia x Pitch mm	Ft-Lbs	kN	Nm	Ft-Lbs 2	kN 3	Nm 4	Ft-Lbs 5	kN 6	Nm 7
  3 x 0.5	0.3		0.5	0.5	1.2	0.9		1.5	1.1
  4 x 0.7	0.8		1.1	1	2.1	1.6		2.7	2
  5 x 0.8	1.5		2.5	2	3.5	3.2		4.4	4
  6 x 1	3		4	6	4.9	5.5		6.1	6.8
  7 x 1					7.3	9.3		9	11.5
  8 x 1	7		9.5	10	9.9	14.5		12.2	18
  9 x 1.25					9.3	13.6		11.5	16.8
  10 x 1.25	14		19	18	15.8	28		19.5	35
  10 x 1.5					14.5	26.6		18	33
  12 x 1.25	26		35	33	23.8	50		29	62
  12 x 1.75					21.3	46		26	56
  14 x 1.5	35		50	55	32	79		40	96
  14 x 2					29	73		36	90
  16 x 1.5	59		80	85	43	121		54	150
  16 x 2					40	113		50	141
  18 x 1.5	81		110	118	57	178		70	220
  18 x 2.5					49	157		60	194
  20 x 1.5	118		160	166	72	248		89	307
  20 x 2.5					63	222		77	275
  22 x 1.5	159		215	225	88	337		109	416
  22 x 2.5					78	305		97	376
  24 x 2	203		275	288	101	420		125	519
  24 x 3					90	383		112	474
  27 x 2	295		400	417	131	615		162	760
  27 x 3					119	568		147	703
  30 x 2	402		545	568	165	850		204	1060
  30 x 3.5					144	772		178	995

  Bolt Spec.	8.8			10.9			12.9
  Dia x Pitch mm	Ft-Lbs 8	kN 9	Nm 10	Ft-Lbs 11	kN 12	Nm 13	Ft-Lbs 14	kN 15	Nm 16
  3 x 0.5	1	2.3	1.8	1.5	3.4	2.6	1.5	4	3
  4 x 0.7	2	4.1	3.1	3	6	4.5	4	7	5.3
  5 x 0.8	4.5	6.7	6.1	6.5	9.8	8.9	7.5	11.5	10.4
  6 x 1	7.5	9.4	10.4	11	13.8	15.3	13	16.1	17.9
  7 x 1		13.7	17.2		20.2	25		23.6	30
  8 x 1	18	18.9	27	26	28	40	33	32	47
  9 x 1.25		17.2	25		25	37		30	44
  10 x 1.25	37	30	53	55	43	78	63	51	91
  10 x 1.5		27	50		40	73		47	86
  12 x 1.25	63	45	95	97	65	139	111	77	163
  12 x 1.75		40	86		50	127		69	148
  14 x 1.5	103	61	150	151	90	220	177	105	257
  14 x 2		55	137		80	201		94	135
  16 x 1.5	159	82	229	232	121	336	273	141	393
  16 x 2		76	214		111	314		130	369
  18 x 1.5	225	110	345	321	157	491	376	184	575
  18 x 2.5		95	306		135	435		158	509
  20 x 1.5	321	140	482	457	199	687	535	233	804
  20 x 2.5		122	432		173	615		203	719
  22 x 1.5	435	172	654	620	245	932	726	266	1090
  22 x 2.5		152	502		216	843		253	987
  24 x 2	553	196	814	789	280	1160	926	237	1360
  24 x 3		175	744		250	1080		292	1240
  27 x 2	811	225	1200	1154	363	1700	1353	425	1990
  27 x 3		230	1100		328	1570		384	1840
  30 x 2	1103	321	1670	1571	457	2370	1837	535	2380
  30 x 3.5		280	1500	300	2130		467		2500

  
  

   

• Motorcycle Spark Plug Cross Reference

  

    The chart below is taken from an industry standard as I collected a compiled for your benefit. to find your correct plug, use the find function in your browser ( in I Explorer 'ctrl F' keys to open the find window) to location your plug and the cross reference plug

  NGK_P/N	NGK ALT	ACCEL	AC DELCO	AUTO LITE	BOSCH	CHAMP	GM NUMBER
  CR7EK	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  AR6FS-11*	N/A	N/A	R83T	124	D8AC	RF18YC	5614094
  AR6FS-11*	N/A	N/A	R83T	804	D8AC	RF10C	5614094
  AR6FS-11*	N/A	N/A	R83T	124	D8AC	RF10C	5614094
  AR6FS-11*	N/A	N/A	R83T	584	D8AC	RF10C	5614094
  AR6FS-11*	N/A	N/A	R83T	124	D8AC	N/A	5612159
  AP9FS	N/A	N/A	84TS	32	DR8BPX	RF9YC	5612150
  AP9FS	N/A	N/A	84TS	32	D8AC	F79Y*	N/A
  DPR8EV-9*	2872	N/A	N/A	4163	N/A	N/A	N/A
  DPR8EV-9*	2872	N/A	N/A	4163	N/A	N/A	N/A
  DPR8EV-9*	2872	N/A	N/A	4163	N/A	N/A	N/A
  BP7ES	N/A	113	R41XLS	53	W5DC	N9YC	5614070
  BP7ES	N/A	113	R41XLS	4252	W5DC	N7YC	5614070
  BP7ES	N/A	113	R41XLS	4252	W5CC	N7YC	5614070
  BR8EVX SOLID*	6747	N/A	N/A	4063	N/A	N/A	N/A
  B8EFS	N/A	N/A	N/A	AR474	N/A	N/A	N/A
  DP6EA-9	N/A	882	R121XLS	4164	XR4CS	RA6HC	5614066
  B9EFS	N/A	N/A	N/A	473	N/A	S59C	N/A
  B7ES	N/A	143	43N*	4055	W7CC	N3C	5613104
  B7ES	N/A	143	41-2XLS*	4055	W7CC	N3C	5613104
  B7ES	N/A	143	43N*	4055	W7CC	N3C	5612241
  B7ES	N/A	143	42XL*	4054	W5CC	N3C	5613103
  B7ES	N/A	143	43XL*	4055	W3CC	N3C	5613104
  B7ES	N/A	143	43XL*	4055	W5CC	N3C	5613104
  B7ES	N/A	143	R43XL	2615	W7CC	N4C	5613312
  B7ES	N/A	143	43XL*	2615	W7CC	N4C	5613104
  B7ES	N/A	143	43XL*	2615	N/A	N4C	5613104
  B7ES	N/A	143	C42N*	2615	N/A	N4C	5612235
  B7ES	N/A	143	S43XL	2615	N/A	N4C	5613458
  B7ES	N/A	143	43XL*	393	W7CC	N4C	5613104
  B7ES	N/A	143	43XL*	393	W7CC	N4C	5613104
  B7ES	N/A	143	43XL*	393	W7CC	N4C	5613104
  BP7EV*	7270	113	R41XLS	52	W5DC	N7YC	5614070
  BP7EV*	7270	113	R41XLS	62	WR5DC	N7YC	5614070
  BP7EV*	7270	113	N/A	N/A	N/A	N/A	N/A
  BP7EV*	7270	113	N/A	N/A	N/A	N/A	N/A
  BR8HCS-10	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DCPR7EVX*	6046	N/A	N/A	N/A	N/A	N/A	N/A
  DPR9EV-9*	3854	N/A	N/A	4162	N/A	RA6HC	N/A
  DPR9EV-9*	3854	882	R121XLS	4162	XR4CS	RA6HC	5614066
  CR8E	N/A	N/A	N/A	4303	N/A	N/A	N/A
  JR10B	N/A	N/A	N/A	4132	N/A	N/A	N/A
  BPR2ES SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BPR7ES	N/A	113	R41XLS	62	W5DC	RN6YC	5614070
  BPR7ES	N/A	113	R41XLS	62	WR5DC	N7YC	5614070
  CR8HSA	N/A	N/A	N/A	4194	N/A	N/A	N/A
  D8EA	N/A	742	S123XL	2755	XR4CS	RA6HC	5613448
  D8EA	N/A	742	S123XL	3854	XR2CS	RA6HC	5613448
  D8EA	N/A	882	R121XLS	4133	XR4CS	RA6HC	5614066
  D8EA	N/A	742	S123XL	4133	XR4CS	RA6HC	5613448
  DPR7EV-9*	7682	N/A	R121XLS	3964	XR4CS	RA6HC	5614066
  DPR7EV-9*	7682	N/A	N/A	4164	N/A	N/A	N/A
  C8HA	N/A	N/A	N/A	4194	N/A	N/A	N/A
  J9A	N/A	N/A	N/A	4132	N/A	RA4HC	N/A
  DPR8EIX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D9EV*	2834	N/A	N/A	N/A	N/A	RA4HC	N/A
  J10B*	1299	N/A	N/A	N/A	N/A	N/A	N/A
  J10B*	1299	N/A	N/A	N/A	N/A	N/A	N/A
  J10B*	1299	N/A	N/A	N/A	N/A	N/A	N/A
  BPR2ES	N/A	N/A	N/A	66	N/A	N/A	N/A
  B7ES-11	N/A	143	43XL*	393	N/A	N4C	5613104
  C7HV*	4533	N/A	S102F	2796	N/A	Z9Y	5613467
  BP10ES*	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP10ES*	3525	N/A	N/A	N/A	N/A	N/A	N/A
  CR10EK	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B8ES	N/A	112	42XL*	4054	W4CC	N3C	5613103
  B8ES	N/A	112	41XL	2594	W3CC	N3C	5613161
  B8ES	N/A	112	S42XL	4063	N/A	N2C	5613457
  B8ES	N/A	112	41XL	2612	N/A	N2C	5613161
  B8ES	N/A	112	41XL	2614	W3CC	N2C	5613161
  B8ES	N/A	112	41XL	4053	W4CC	N2C	5613161
  D9EA	N/A	N/A	N/A	4132	N/A	A59C	N/A
  D9EA	N/A	N/A	N/A	4132	N/A	RA4HC	N/A
  D6HV*	6512	N/A	N/A	N/A	N/A	N/A	N/A
  CR4HSA	N/A	N/A	N/A	4194	N/A	N/A	N/A
  B9ES	N/A	112	41XL	2593	W2CC	C61C	5613161
  B9ES	N/A	112	41XL	2594	W3CC	N3C	5613161
  B9ES	N/A	112	S41XL	4052	N/A	N2C	5613454
  B9ES	N/A	112	41XL	2612	W3CC	N2C	5613161
  B9ES	N/A	112	41XL	2613	W3CC	N2C	5613161
  B9ES	N/A	112	41XL	4052	W3CC	N2C	5613161
  B9ES	N/A	112	41XL	4052	W3CC	N2C	5613161
  D8HV*	7112	N/A	S122F	2714	XR2AS	P7	5613470
  DCPR9E	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP8EVX	N/A	N/A	N/A	51	N/A	N/A	N/A
  C8HVX	N/A	N/A	N/A	4194	N/A	N/A	N/A
  BP7ES-11	N/A	113	R41XLS	52	W5DC	N7YC	5614070
  D7EVX	N/A	N/A	N/A	4133	N/A	N/A	N/A
  D7EV*	2734	N/A	R121XLS	4133	XR4CS	RA8HC	5614066
  D8EVX	N/A	N/A	N/A	4132	N/A	N/A	N/A
  DPR8EVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B7ES SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR5EA-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  AB-6	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DR8ES-L	N/A	882	R121XLS	4143	XR4CS	RA6HC	5614066
  DR8ES-L	N/A	882	R121XLS	4163	XR4CS	RA6HC	5614066
  DR8ES-L	N/A	882	R121XLS	3964	XR4CS	RA8HC	5614066
  B6S BL1	N/A	N/A	44*	N/A	N/A	N/A	1559492
  DP8EVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DP8EVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR6HSA	N/A	N/A	S102F	2796	N/A	Z9Y	5613467
  D8EV*	2850	882	R121XLS	N/A	XR4CS	RA6HC	5614066
  B6Y BL1	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B4L	N/A	166	45L*	216	W7EC	H10C	1559483
  B4L	N/A	166	45LS*	216	N/A	H10C	5612212
  B4L	N/A	166	M44L*	216	N/A	H10C	5612568
  B4L	N/A	166	45L*	996	WR9FC	H10C	1559483
  B4L	N/A	166	45LS*	216	W7EC	H10C	1559483
  B4L	N/A	166	46F,C43L	225	WR8EC	RH10C	5613658
  B4L	N/A	166	45L*	216	WR9FC	RH18Y	1559483
  B4L	N/A	166	45L*	437	WR9FC	RH18Y	1559483
  B4L	N/A	166	45L*	447	WR9FC	RH18Y	1559483
  DR7ES	N/A	N/A	R121XLS	3954	XR4CS	RA6HC	5614066
  DR7ES	N/A	N/A	R121XLS	2755	XR4CS	RA8HC	5614066
  C8EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  JR9B	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B6L	N/A	166	C43L	436	WR9FC	H14Y	1559450
  B6L	N/A	166	C43L	216	W7EC	RH8C	1559450
  B6L	N/A	166	C43L	216	W7EC	RH8C	1559450
  B6L	N/A	166	C43L	3507	W7EC	H8C	1559450
  B6L	N/A	166	C43L	2675	W7EC	H8C	1559450
  B6L	N/A	166	C43L	3325	W7EC	H8C	1559450
  B6L	N/A	166	C43L	494	W7EC	H8C	1559450
  B6L	N/A	166	C43L	495	W7EC	H8C	1559450
  B6L	N/A	166	C43L	996	W7EC	H8C	1559450
  B6L	N/A	166	45L*	215	W9AC0	H10C	1559483
  B6L	N/A	166	45L*	216	W9AC0	H10C	1559483
  B6L	N/A	166	C43L	2676	W7EC	H10C	1559450
  B6L	N/A	166	C45L	497	W7EC	H10C	1559452
  C6HSA	N/A	N/A	S102F	2795	UR3AS	Z9Y	5613467
  BP4H	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  DP9EVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  C9EHVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  C9EHVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B8EG	N/A	112	41XL	4053	W4CC	N2C	5613161
  B8EG	N/A	112	N/A	2416	W4CC	N/A	5613161
  B8EG	N/A	112	N/A	2417	W4CC	N/A	5613161
  B8EG	N/A	112	N/A	2417	W07CS	N/A	5613161
  B8EG	N/A	112	N/A	2416	W3CC	N/A	5613161
  B8EG	N/A	112	N/A	2416	W3CC	N/A	5613161
  DR9EA	N/A	N/A	N/A	N/A	N/A	RA4HC	N/A
  CR8EK	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DCPR6E	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR7EH-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BU6EFSZ	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP4HA	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  BR6S	N/A	124	R44*	303	WR8EC	RJ6C	5613865
  BR6S	N/A	124	R44*	303	WR8EC	RJ6C	5613865
  BR6S	N/A	124	R44*	303	WR8EC	RJ6C	5613865
  BR6S	N/A	124	R44*	363	W7EC	RJ6C	5613865
  BP10EV*	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B9EG	N/A	112	N/A	2415	N/A	C59	5613161
  B9EG	N/A	112	N/A	N/A	N/A	C59	5613161
  B9EG	N/A	112	41XL	2415	W2CS	C59R	5613161
  B9EG	N/A	112	41XL	2415	W2CS	N86,N84	5613161
  B9EG	N/A	112	41XL	4052	W3CC	N86,N84	5613161
  BP4HS	N/A	N/A	R43FS	275	W6BC	L87YC	5613526
  BP4HS	N/A	N/A	R43FS	275	W6BC	L87YC	5613526
  BP8EV*	5576	112	R41XLS	51	W4CC	N6YC	5614070
  BP8EV*	2671	112	N/A	N/A	N/A	N/A	N/A
  B10EG	N/A	N/A	N/A	2414	W07CS	N/A	N/A
  B10EG	N/A	N/A	N/A	2414	W07CS	C57C*	N/A
  B10EG	N/A	N/A	N/A	2414	W07CS	C57C*	N/A
  B10EG	N/A	N/A	N/A	2414	WO7CS	C57C*	N/A
  B10EG	N/A	N/A	N/A	2414	W07CS	C57C*	N/A
  B10EG	N/A	N/A	S40XL*	4051	W3CC	C57C*	N/A
  LFR6A-11	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B8ES SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR9EVX-9*	5545	N/A	N/A	4162	N/A	N/A	N/A
  CR9EHVX-9	N/A	N/A	N/A	4302	N/A	N/A	N/A
  BPR8ES	N/A	112	R41XLS	51	W4CC	N6YC	5614070
  BPR8ES	N/A	112	41XL	4053	N/A	N2C	5613161
  BPR8ES	N/A	112	41XL	4053	N/A	RN4YC	5613161
  DCPR7E	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP7ES SOLID	N/A	N/A	N/A	4252	N/A	N/A	N/A
  B8EG SOLID	N/A	N/A	N/A	4053	N/A	N/A	N/A
  B9EG SOLID	N/A	N/A	N/A	4052	N/A	N/A	N/A
  BPR5ES SOLID	N/A	N/A	N/A	4255	N/A	N/A	N/A
  BPR6ES SOLID	N/A	N/A	N/A	4263	N/A	N/A	N/A
  DCPR8E SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BR6HSA	N/A	N/A	N/A	414	N/A	N/A	N/A
  BR8HV	6265	N/A	R41F*	2653	W3AC	N/A	5614067
  C8EHVX-9	N/A	N/A	N/A	4303	N/A	N/A	N/A
  C7HVX	N/A	N/A	N/A	4194	N/A	N/A	N/A
  CR8EHVX-9	N/A	N/A	N/A	4303	N/A	N/A	N/A
  CR9EK	N/A	N/A	N/A	4302	N/A	N/A	N/A
  CR7HSA	N/A	N/A	N/A	4194	N/A	N/A	N/A
  CR7E	N/A	N/A	N/A	4303	N/A	N/A	N/A
  J9B*	3188	N/A	N/A	N/A	N/A	N/A	N/A
  J9B*	3188	N/A	N/A	N/A	N/A	N/A	N/A
  C7HSA	N/A	N/A	S102F	2795	UR3AS	Z9Y	5613467
  BPR6HSA	N/A	N/A	N/A	273	N/A	N/A	N/A
  C9EVX	N/A	N/A	N/A	4302	N/A	N/A	N/A
  C9EVX	N/A	N/A	N/A	4302	N/A	N/A	N/A
  FR9BI-11	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  C6HA	N/A	N/A	S102F	2796	UR3AS	Z9Y	5613467
  BR9EV	N/A	112	R41XL	4062	W3CC	N2C	5614068
  DPR8Z	N/A	N/A	N/A	4163	N/A	N/A	N/A
  DPR8Z	N/A	N/A	N/A	4163	N/A	N/A	N/A
  DPR9Z	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR9Z	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR8EA-9	N/A	882	R121XLS	2593	XR4CS	C61C	5614066
  DPR8EA-9	N/A	882	R121XLS	2593	XR4CS	C61C	5614066
  DPR8EA-9	N/A	882	R121XLS	4163	XR4CS	RA6HC	5614066
  BPR4HS-10	N/A	N/A	R43FS	275	W6BC	L87YC	5613526
  C7E	N/A	N/A	N/A	4303	N/A	G59C	N/A
  BR7ES	N/A	142	R43XL	3462	W5CC	RN3C	5613312
  BR7ES	N/A	142	R43XL	402	W4CC	RN3C	5613312
  DR8HS	N/A	N/A	S122F	4173	XR2AS	P7	5613470
  DPR7EA-9	N/A	882	R121XLS	4164	XR4CS	RA6HC	5614066
  DPR7EA-9	N/A	N/A	R121XLS	4162	XR4CS	RA6HC	5614066
  JR8C	N/A	N/A	N/A	4143	N/A	N/A	N/A
  B10EGP	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B10EGP	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR9EA-9	N/A	882	R121XLS	4162	XR4CS	RA6HC	5614066
  DPR9EA-9	N/A	882	R121XLS	4164	XR4CS	RA6HC	5614066
  DR8ES	N/A	882	R121XLS	4163	XR4CS	RA6HC	5614066
  DPR6EA-9	N/A	882	R121XLS	4164	XR4CS	RA6HC	5614066
  BR8HSA*	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR9EIX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B8EGV	N/A	112	41XL	4053	W3CC	N2C	5613161
  B8EGV	N/A	112	41XL	4053	W3CC	N87*	5613161
  DP7EA-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DP9EV-9*	3331	N/A	N/A	N/A	N/A	N/A	N/A
  DP9EV-9*	3331	N/A	N/A	N/A	N/A	N/A	N/A
  CR8EH-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B9HS	N/A	156	M40FFX	411	W3AC	L78C	5613574
  B9HS	N/A	156	M40FFX	411	W3AC	L78C	5613574
  B9HS	N/A	156	41F	N/A	N/A	L82C	5614011
  B9HS	N/A	N/A	S40F	N/A	N/A	L77JC4	5613452
  B9EGV	N/A	112	41XL	4052	W2CC	N86,N94	5613161
  DP8EA-9	N/A	882	R121XLS	4153	XR4CS	RA6HC	5614066
  DP8EA-9	N/A	882	R121XLS	4153	XR4CS	RA6HC	5614066
  ER9EH	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B10EGV	N/A	N/A	S40XL*	4051	W3CC	N57G*	N/A
  CR9EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  B10H*	2399	N/A	R41F*	N/A	W3AC	QL55	5614067
  DP7EV-9*	7682	N/A	N/A	N/A	N/A	N/A	N/A
  JR9C	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D5HS*	4523	N/A	N/A	N/A	N/A	N/A	N/A
  BPR5HS	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  CR9E	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR10E	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  LFR5A-11	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR8EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D6HA	N/A	N/A	S124FS	2716	N/A	P8Y	5613471
  D6HA	N/A	N/A	S124FS	2735	N/A	P8Y	5613471
  D6HA	N/A	N/A	S124FS	4173	N/A	P10Y	5613471
  D6HV	N/A	N/A	S124FS	4173	N/A	P8G	5613471
  BPR4ES SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DP9EA-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DP9EA-9	N/A	N/A	N/A	4152	N/A	N/A	N/A
  B7EV*	N/A	142	42XL*	4054	W5CC	N3C	5613103
  B7EV*	N/A	142	R42XL*	2417	W5CC	N/A	5613388
  B8EV	N/A	112	41XL	4053	W4CC	N2C	5613161
  B7EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR6HS	N/A	N/A	S102F	2795	UR3AS	Z9Y	5613467
  B8EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D8HA	N/A	N/A	S122F	2715	XR2AS	P7	5613470
  D8HA	N/A	N/A	S122F	4173	XR2AS	P7	5613470
  B9EV	N/A	112	41XL	4052	W2CC	N2C	5613161
  B9ES SOLID	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DR8EA	N/A	N/A	S102F	2796	N/A	Z9Y	5613467
  D10HS	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BPM7*	4226	N/A	N/A	N/A	N/A	N/A	N/A
  CR7HS	N/A	N/A	S102F	2796	UR3AS	Z9Y	5613467
  CR7HS	N/A	N/A	S102F	2796	UR3AS	Z9Y	5613467
  BPR7ES-11	N/A	113	R41XLS	62	WR5DC	N6YC	5614070
  CR8HVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP7EVX-11	N/A	N/A	R42XLS	AP62	N/A	N/A	N/A
  B9EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP7EVX	N/A	N/A	4	AP62	N/A	N/A	N/A
  BP5HA	N/A	N/A	N/A	4114	W8BC	N/A	N/A
  B6ES	N/A	143	43XL*	2616	W8CC	N5C	5613104
  B6ES	N/A	143	43XL*	394	W8CC	N5C	5613104
  B6ES	N/A	143	43XL*	4056	W7CC	N5C	5613104
  B6ES	N/A	143	43XL*	4056	W7CC	N5C	5613104
  B6ES	N/A	143	44N*	N/A	W7CC	N5C	5612240
  B6ES	N/A	143	N/A	N/A	W7CC	N4C	5613104
  B6ES	N/A	143	N/A	N/A	W7CC	N4C	5613104
  B6ES	N/A	143	44XL*	N/A	W7CC	N4C	5613179
  B6ES	N/A	143	44N*	N/A	N/A	N4C	5612240
  B6ES	N/A	143	44XL*	N/A	N/A	N4C	5612791
  B6ES	N/A	143	C43N*	N/A	N/A	N4C	5612874
  B6ES	N/A	143	S44XL	N/A	N/A	N4C	5613461
  DP8EV-9*	2933	N/A	N/A	N/A	N/A	N/A	N/A
  DP8EV-9*	2933	N/A	N/A	N/A	N/A	N/A	N/A
  DP8EV-9*	2933	N/A	N/A	N/A	N/A	N/A	N/A
  J10A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BP7HVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  C8E	N/A	N/A	N/A	N/A	N/A	G59C	N/A
  C8EH-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  JR9A*	3188	N/A	N/A	N/A	N/A	N/A	N/A
  JR9A*	3188	N/A	N/A	N/A	N/A	N/A	N/A
  CR9EH-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  CR9EH-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D6EA	N/A	N/A	R121XLS	N/A	XR4CS	RA8HC	5614066
  BPR10EVX	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR7EVX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  DPR7EIX-9	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  BPR4HS	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  BPR4HS	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  BPR4HS	N/A	N/A	R43FS	N/A	W6BC	L87YC	5613526
  DR7EA	N/A	N/A	R121XLS	N/A	XR4CS	RA8HC	5614066
  CR5HSA	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  D7EA	N/A	742	S123XL	4133	XR4CS	RA6HC	5613448
  N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
  N/A	N/A	N/A	N/A	N/A	N/A	N87G*	N/A
  B105EGV*	N/A	N/A	N/A	N/A	N/A	N/A	N/A

• Keihin vs. Mikuni jet size Comparison Chart...

  

    This Chart was compiled to help you with interchanging jets from manufacture. it also allows your jet sizes

  Width	Keihin #	DynoJet #	Mikuni #
  0,0350	92,5	92	86,3
  0,0360	95	94	88,1
  0,0370	97,5	96	90,0
  0,0380	100	98	91,9
  0,0390	102,5	100	93,8
  0,0400	105	102	95,6
  0,0410	107,5	104	97,5
  0,0420	110	106	99,4
  0,0430	112,5	108	101,3
  0,0440	115	110	103,1
  0,0450	117,5	112	105,0
  0,0460	120	114	106,9
  0,0470	122,5	116	108,8
  0,0480	125	118	110,6
  0,0490	127,5	120	112,5
  0,0500	130	122	114,4
  0,0510	132,5	124	116,3
  0,0520	135	126	118,1
  0,0530	137,5	128	120,0
  0,0540	140	130	121,9
  0,0550	142,5	132	123,8
  0,0560	145	134	125,6
  0,0570	147,5	136	127,5
  0,0580	150	138	129,4
  0,0590	152,5	140	131,3
  0,0600	155	142	133,1
  0,0610	157,5	144	135,0
  0,0620	160	146	136,9
  0,0630	162,5	148	138,8
  0,0640	165	150	140,6
  0,0650	167,5	152	142,5
  0,0660	170	154	144,4
  0,0670	172,5	156	146,3
  0,0680	175	158	148,1
  0,0690	177,5	160	150,0
  0,0700	180	162	151,9
  0,0710	182,5	164	153,8
  0,0720	185	166	155,6
  0,0730	187,5	168	157,5
  0,0740	190	170	159,4
  0,0750	192,5	172	161,3
  0,0760	195	174	163,1
  0,0770-	197,5	176	165,0
  0,0780	200	178	166,9
  0,0790	202,5	180	168,8
  0,0800	205	182	170,6
  0,0810	207,5	184	172,5
  0,0820	210	186	174,4
  0,0830	212,5	188	176,3
  0,0840	215	190	178,1
  0,0850	217,5	192	180,0
  0,0860	220	194	181,9
  0,0870	222,5	196	183,7
  0,0880	225	198	185,6
  0,0890	227,5	200	187,5

• Chain Size Chart...

  

    This Chart was compiled to help you to identify your chain and sprockets. with your chain size, pitch and inner width and roller, this should help you get your correct chain.

  Chain Size	Pitch	Inner Width - roller
  415	1/2	3/16
  420	1/2	1/4
  428	1/2	15/49
  520	5/8	1/4
  525	5/8	5/16
  530	5/8	3/8
  630	3/4	3/8
  219	1/3	15/82
  #35	1/8	3/16
  #25	1/4	1/8
  8mm	8mm
  10mm	10mm

• Motorcycle Tire Size Conversion Chart

  

  These Motorcycle Tire Speed Ratings, Load Ratings and Motorcycle Tire Size Designations Tables are to help guide you in the right direction for finding the correct tire for your motorcycle. each riders, bike, weights and calculations are different so remember this only a guide.

  Front Tires
  metric	alpha	inch
  80/90	MH90	2.50/2.75
  90/90	MJ90	2.75/3.00
  100/90	MM90	3.25/3.50
  120/80		4.25/4.50
  120/90	MR90	4.25/4.50
  130/90	MT90	5.00/5.10

  Rear Tires
  metric	alpha	inch
  110/90	MP85	4.00/4.75
  120/90	MR90	4.50/4.75
  130/80		5.00/5.10
  140/80		5.50/6.00
  140/90	MU90	5.50/6.00
  150/80	MV85	6.00/6.25
  150/90	MV85	6.00/6.25

  SPEED RATING CHART
  Motorcycle Speed Ratings	Maximum Design/ Test Speed
  	J Type	62	100
  	N Type	87	140
  	P Type	94	150
  	S Type	112	180
  	H Type	130	210
  	V Type	149	240
  	Z Type	149+	240+

  LOAD INDEX (LI) RATING CHART
  LI	lbs.	LI2	lbs.3
  20	176	53	454
  21	182	54	467
  22	187	55	481
  23	193	56	494
  24	198	57	507
  25	204	58	520
  26	209	59	536
  27	215	60	551
  28	220	61	567
  29	227	62	584
  30	234	63	600
  31	240	64	617
  32	247	65	639
  33	254	66	661
  34	260	67	677
  35	267	68	694
  36	276	69	716
  37	282	70	736
  38	291	71	761
  39	300	72	783
  40	309	73	805
  41	320	74	827
  42	331	75	853
  43	342	76	882
  44	353	77	908
  45	364	78	937
  46	375	79	963
  47	386	80	992
  48	397	81	1019
  49	408	82	1047
  50	419	83	1074
  51	430	84	1102
  52	441

  

• Scitsu Tacho Guide

   We have had many questions about these tachometers. where can i find one? how much are they? and how do i hook it up?
  As for where you can get one.. well there are many distributors out there that do carry these tachometers. althought they are primaraly and English company, we do see them in the USCRA.
   As far ad hooking them up, we have the Scitsu Tacho Guide to help you with your installation. we have seen this tach float from one bike or owner to another. the same question always comes up. How do i hook it up? well we hope this will help you with your tach. so here is your Guide in PDF