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Post Info TOPIC: so weve got a gremlin...help any ideas people


DTR Trusted Engine Builder

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so weve got a gremlin...help any ideas people
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well had a day in the garage today

all bolted up and doing the final bits and bobs

got it started and it will not run without choke on

checked all carb,strip,soak,blow out once then again

checked float height ,re-fitted still the same

 

so chucked the old carb on the vm26 round slide one

started and ran the same cut out soon as choke off, revs as normal once its over 4 grand,

runs just like its got a blocked jet in the carb

so stripped that one and did the same checks ,re-fitted same again

furious getting stressed out now ha ha

moved on to left crank seal, no residue or sighns of leaks new seal also

good compression as its a new top end

got the pv pinned half open

inside of the cylinder was well wet with gray sumthing so im assuming, there was a leak some where and coolants been injested

so iv stripped the top end off cleaned, checked & fitted new gaskets and re built- so godda wait untill i can get it running again to see if theres any change,it ,must be some thing to do with the engine sin as it was doing the exact same with both carbs

any one got any thing to say/ask sudjest

cheers

norfesmile



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NEV


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Only my two bobs worth, but I'd go back to that crank seal again, run the bike then spray wd40 towards the seal, if the engine revs races its the seal deffo, in the past my dealings with seals, just because its new doesn't mean its not going to let ya down.
But like I say only a suggestion, as thats what was up with mine, and I had to get it to a garage to sort it.

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DTR Trusted Engine Builder

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ye nev

i was just talking to my old man telling him about this i read on ur thread b4, im gonna get another seal now to try

surely it must be the motor/side of things with it doing the same with both carbs fitted ehh !

exactly the same aswell confuse



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DTR Trusted Engine Builder

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NEV wrote:

Only my two bobs worth, but I'd go back to that crank seal again, run the bike then spray wd40 towards the seal, if the engine revs races its the seal deffo, in the past my dealings with seals, just because its new doesn't mean its not going to let ya down.
But like I say only a suggestion, as thats what was up with mine, and I had to get it to a garage to sort it.


 do you no if the oem seals are the double lip ones? viton or just normal single lip

iv got single lip ones i think so may be the problem just a thought



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NEV


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Sorry bud no idea, I took mine to a bloke who diagnosed it for me, he replaced the seal too, so I never saw, but if thats your hunch, go for it, you tested with wd40 spray nr crank seal yet?

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DTR Trusted Engine Builder

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no engines out of frame at mo

i went to check all nuts around the cylinder and the front right base stud stripped threads so had to have it out and helicoil it...been one of those days ha ha

gonna strip and check/re-seal all the inlet manifold joints make sure there not letting air in either while i can get to it all



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