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Post  ledler Thu Dec 03, 2020 12:51 am

Are cylinder timing shims (between cyl and crankcase) available for purchase somewhere?

Thanks
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Post  getback Thu Dec 03, 2020 7:58 am

Cox international has them , for some reason i couldnt find them on there web site but here on there eBay site https://www.ebay.com/itm/371651878147?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=371651878147&targetid=934793863176&device=c&mktype=pla&googleloc=9009593&poi=&campaignid=10459841973&mkgroupid=104612009900&rlsatarget=pla-934793863176&abcId=2146002&merchantid=111921800&gclid=Cj0KCQiAtqL-BRC0ARIsAF4K3WGdDVYf6PfS_mBEanwqcTmzwN6SrwZwkNOcOO5KD1drH9f97HPz7qIaAudCEALw_wcB
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Post  1/2A Nut Thu Dec 03, 2020 8:44 am

That's not it Eric, you showed him head shims for the TD .010

He is looking for timing shims for the cylinder.
From crankcase to cylinder threads to change the seating height.
They are not in stock anywhere.

You can use .09 head gasket shims for cylinder shims with the .049 - .051
.049 for .020
.020 for .010
The .074 may fit the .049 just have to try.

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Post  ledler Thu Dec 03, 2020 1:27 pm

Thanks 1/2 A Nut for the very helpful information.
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Post  ledler Thu Dec 03, 2020 1:27 pm

Thanks 1/2 A Nut for the very helpful information.
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Post  sosam117 Thu Dec 03, 2020 2:45 pm

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:
cylinder shims Kustom12

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.

cylinder shims Kustom13
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Post  davidll1984 Thu Dec 03, 2020 10:47 pm

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
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Post  davidll1984 Thu Dec 03, 2020 11:05 pm

Ils the engine wit bad crankcase heightcylinder shims 16070512
cylinder shims 16070510
cylinder shims 16070511
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Post  davidll1984 Thu Dec 03, 2020 11:27 pm

Without the parts piston of tdc look cylinder shims 16070513
cylinder shims 16070514
cylinder shims 16070515
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 Doh! Blow up Mad!
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Post  getback Fri Dec 04, 2020 6:54 am

O my God SORRY ledler , i was thinking i have never seen .010 CC shims before . Should have been a red flag there Mad Thanks Brad !
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Post  fredvon4 Fri Dec 04, 2020 9:05 am

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
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Post  emanuel Fri Dec 04, 2020 10:43 am

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/
cylinder shims Img_2017
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Post  OhBee Fri Dec 04, 2020 5:19 pm

How on earth is a normal human being supposed to cut something like that out? ......well near normal anyway!
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Post  emanuel Sat Dec 05, 2020 2:55 am

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.
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