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Problem when pulling clutch
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I recently changed the engine gaskets on my 350. When I pull the clutch upshifting or downshifting and pulling the throttle again there is hesitation and once the engine died. I suspect some kind of crack at the carb inlet, oil breather. Any other place I should look? I believe air is getting in there when shifting gears...



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That's a wierd one!
Presuming as you open and close the throttle at standstill the engine does not die or hesitate, that eliminates the carb and rubbers moving in any way.
If you didnt have the problem before you changed the gaskets, then it must be something to do with the the items you removed to change the gaskets.
You dont state what you have changed, but have a good look at each area involved. Did you dismantle the carb? If not then perhaps you should and check to see it is all clean and you have not disturbed some stuff just moving it around.

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The mechanic took the inlet manifold off and put some sealant because the o-ring had flattened. I suspect the sealant is uneven or a new o-ring should have been used. At standstill, I can rev without problem, cold starts are ok. I will order a new manifold with o-ring because there was no other intervention.

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spray the inlet stub with wd40 see if there is a different tone to the engine if so drawing air BE CAREFULL NOT TO SPRAY WD40 ON TO THE EXHAUST IT IS FLAMMABLE

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Something to do with the clutch/neutral/kickstand/starter inhibitor circuit? A bit off-the-wall, but when you mention pulling the clutch to change gear...

I can't see why it would be that, but it's certainly an odd one!

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mossproof wrote:

Something to do with the clutch/neutral/kickstand/starter inhibitor circuit? A bit off-the-wall, but when you mention pulling the clutch to change gear...

I can't see why it would be that, but it's certainly an odd one!


 Took the bike for a test. Opened up in fourth gear and pulled the clutch while braking, with the clutch pulled I twisted the throttle, the engine died. No kickstand safety switch on the bike. Hesitation is observed when I release the clutch and twist the throttle, on the move. At standstill or when in gear it revs perfectly. I thought that since nothing else was done to the bike, it should be a carb seal issue, allowing more air to be sucked in making the mixture too lean (someone had a similar problem and found the inlet manifold was cracked). If you think of anything else please let me know.



-- Edited by Christos on Friday 29th of October 2021 09:41:35 PM

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JOHNYBOY wrote:

spray the inlet stub with wd40 see if there is a different tone to the engine if so drawing air BE CAREFULL NOT TO SPRAY WD40 ON TO THE EXHAUST IT IS FLAMMABLE


 Useful tip, thanks!



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