FITS* = A, B

118cc BORE KIT - HIGH COMP

55mm 13.5:1 Compression, 14mm Pin

Kit will bore into the stock 100 cylinder, no re-sleeve or case machining. Works with stock crank.

INCLUDES: Forged piston, 14mm pin, rings, circlips, headgasket, basegasket.

REQUIRES: Boring, rejetting, race gas 108 octane+.

#00361

$290.00

FITS* = A, B

118cc BORE KIT - STD. COMP

55mm 10.5:1 Compression, 14mm Pin

Same as above, but with low enough compression to run pump fuel. Horsepower increase with this kit is minimal. We strongly recommend the high compression kit for race engines!

Kit will bore into the stock 100 cylinder, no re-sleeve or case machining. Works with stock crank.

INCLUDES: Forged piston, 14mm pin, rings, circlips, headgasket, basegasket.

REQUIRES: Boring, rejetting.

#00361LC

$290.00

FITS* = C, D, E

True 125cc BORE KIT - HI COMP

57mm Piston, 15mm Pin

125cc's alone, 151cc with our 9.5mm Stroke

  ● With Solid 125 head and std. stroke = 12:1 Compression

  ● With Solid 125 head and +9.5mm stroke = 14:1 Comp

  ● With 1-pc big valve head** and +9.5mm stroke = 12:1 Comp

Quick and easy boost in power. Great "bang for the buck".

AHRMA legal in the 125 classes alone AND with +9.5mm stroke.

INCLUDES: Forged piston, 15mm pin, rings, circlips, headgasket, basegasket.

REQUIRES: Cylinder Boring,  Rejetting, 108+ octane fuel.

100cc Models - For use with 100cc engines, our +9.5mm stroke and a 125 head would be required. Compression with a 100 head would be excessive, and beyond the capacity of the cylinder studs.

**Requires special piston mods, call to order.

#00366

$299.00

FITS* = C, D, E (A, B - ONLY with Stroker kit listed below)

145cc BORE KIT - STD. COMP

61mm Piston, 9.5:1 Compression, 15mm Pin

Great increase in overall horsepower. Best option for racers who want to rev.

AHRMA legal in the 125 classes (145cc bore kit, or +9.5mm stroke, not both)

INCLUDES: Sleeve, forged piston, 15mm pin, rings, circlips, headgasket.

REQUIRES: Re-sleeving cylinder. Case machining if you are using 100 cases (fits 125 cases with no machining). Rejetting.

ALL 100cc MODELS ALSO REQUIRE:  Powroll stroker crank (for 15mm piston pin size), case machining.

#00019F

$330.00

FITS* = C, D, E (A, B - ONLY with Stroker kit listed below)

145cc BORE KIT - HIGH COMP

61mm Piston, 11:1 Compression

Great increase in overall horsepower. Best option for racers who want to rev.

AHRMA legal in the 125 classes (145cc bore kit, or +9.5mm stroke, not both)

INCLUDES: Sleeve, forged piston, 15mm pin, rings, circlips, headgasket.

REQUIRES: Re-sleeving cylinder. Rejetting. Mix of 1/2 premium pump fuel and 1/2 race fuel recommended.

ALL 100cc MODELS ALSO REQUIRE:  Powroll stroker crank (for 15mm piston pin size), case machining.

#00019HC

$330.00

FITS* = C, D, E

   (A, B - ONLY with 145cc kit above, or stock 125 piston)

STROKE + 9.5mm  W/ HEAVY DUTY ROD

59mm Total Stroke, 15mm Piston Pin. 148cc with 56.5mm (standard 125) Bore. 151cc with 57mm Bore, 173cc with 61mm Bore.

Smooth, torquey power. Best low-end throttle response. Works extremely well for tight tracks. Legal for AHRMA 125cc MX classes if used with a stock-sized 125cc piston (skirting may be required).

INCLUDES: New rod (standard 125 15mm piston pin size), crank pin and big-end bearing. Stroke work done on your stock crank assembly.
REQUIRES: Send in your crank for modification. Download our Stroker Booklet for details.

RECOMMENDATIONS: Works best with Powroll pistons. Modifications may be required if using other piston or cam brands.  A 125 head can be used, or the 100 head.

#16010RA for A,B with 145cc kit, or any 15mm pin piston.

$425.00

#16005RA for C, D, E with any piston

$425.00

Send in your crank for work. Read Stroker Info booklet for details.

FITS* = C,D

CAM - RACE HARDWELD

Lift .320” IN/EX HARDWELD CAM

Designed for engines 145cc's and larger. Race profile, great midrange and top end power.

If you have a VERY GOOD, LIKE NEW core, we can hardweld on your core (#12614 below). We see very few good used cores for this engine, most used cores have about a 5% likelihood of being useable.

REQUIRES: Valve Springs #24040 (see below).

#12614

$140.00

FITS* = A, B

CAM - RACE HARDWELD

Designed specifically for our 118cc high compression kit.

If you have a VERY GOOD, LIKE NEW core, we can hardweld on your core. We see very few good used cores for this engine, most used cores have about a 5% likelihood of being useable.

REQUIRES: Valve Springs #24040 (see below).

#12769

$140.00

FITS* = A, B, C, D, E

(also XL/XR 200 (two valve), and ATC 200x)

CAM SPROCKET - ADJUSTABLE

Adjustable Timing Sprocket

Re-degree any cam, index holes will give up to approximately 6 degrees advance and 6 degrees retard.
 

#23205

$50.00

FITS* = A, B, C, D

VALVE SPRINGS

Made to better withstand valve float with higher lift cams. Uses stock retainers and shims.

#24040

$50.00

FITS* = A, B, C, D, E  Also fits all Honda carburetors using main jets with the starting digits of 99114-246-****

JET KIT

Kit includes: Jetting instructions, one each: 85, 95, 100, 105, 110, 115, 120, 125, 130, 135 Genuine Keihin Main Jets.

Jetting specifications included for the following models:
1970: CB100, CL100, SL100
1971: SL125, SL100, CB100, CL100
1972: CB100, CL100, SL100, SL125
1973: CB125, CL100, CL125, SL100, SL125, TL125
1974: XL100, TL125, CB125, CL125
1975: CB125, TL125, XL100, XL125
1976: CB125S, XL100, XL125 (two carb styles, must have 105, not 98 main jet stock), XL175
1977-1978: XL175

#21352

$35.00

FITS* = A, C, D

CLUTCH SPRINGS

Stronger than stock for better resistance to slippage in performance applications.

#16775

$29.00