cylinder shims

Thanks 1/2 A Nut for the very helpful information.

Thanks 1/2 A Nut for the very helpful information.

I have made my own, since I no longer can get them from Kustom Kraftsmanship.
Making my own I can get the timing exact with many different brass shims.
https://www.coxengineforum.com/t13945-shimming-cox-cylinder-for-transfer-and-exhaust-timing?highlight=timing+shims

Kustom Kraftsmanship had a kit for shimmng the cylinder height for timing.
I still have "one" kit that is still new in the original package (that is where the instructions came from).

Instructions from kit:


Shims:
starting top left -  brass holder to help get the shim on the bottom of the cylinder.
Then there are two shims that are .003" and two that are .005" thick.

Y like To eliminate spi on no3 cylinder that use twin bypas wit two boost each side y just take cap of back plate of the engine crankcase and blow air from casing unsrew cylinder until no air went tru and mesure start place exaust collector on and blow inside wit tube if air circulate Not Good for presurised pipe setup try multiple crankcase and some casing wil need ajustement som wil fit Perfect without ajustement use of collector on tee dee need mutch ajustement y just sand lower parts its long process take time To mesure y can use light tru from the bothom of casing and if light went tru Not Good for presure from pipe y have buy tee dee engine wit bad modification To the casing y fix them using exaust collector modification and if y was use spi than chim wit multiple .09 gasket wil fix the trouble To raise cylinder if spi To large gap exaust is reduced To... wrong spi clearence result lose in performance if swap back plate wit difrent engines parts make sure To check clerance wit piston pin crank conecting rod and casing place piston cylinder back plate used for the setup tight back plate verify take cylinder of and push conecting rod on back plate turn crank if Not on track inside crankcase it wil bind rub inside the track wit new engine y make sure place crank up pointing sky and turn engine slow in both direction if Feel like rubing inside or bind wit casing sand back of the crankcase long process mesure piston conecting rod have to toutch back plate Not the casing its importants To verify Not To destroy engine crank and piston conecting rod from conecting rod lock in casing

Ils the engine wit bad crankcase height

Without the parts piston of tdc look


The cylinder in picturs its Not made wit spi instaled on that one engine it have spi  exept piston exit top of its cylinder lol y dont no wat the owner of that pice of crap modification belong To now its ok wit exaust collector modification no spi like its was made for look like rc .05 modification atempt To use spi ??? Y hate Find engine wit sutch bad altération found him wit bent conecting rod by chance crank pin is ok y bet the engine has Not run wit that bad modification lol blurrbpp

Leo

The shims I will mail you are NOT the KK kit...these came from Bernie at Cox International

Envelop with three progressively thicker shims to mix and match

No shim holder like the kit

I recently bought these timing shims from someone on ebay. However, cox parts are not listed on the provider's website. https://www.rapidhobbyimport.nl/

How on earth is a normal human being supposed to cut something like that out? ......well near normal anyway!

You can glue a thin copper plate to a wooden plate with water-soluble glue and cut out the washers with a circular cutter. Then remove the washers with water.