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Post by guiri on May 16, 2010 2:50:23 GMT 1
i fitted a 350ypvs motor i got second hand cheap and complete with carbs and servo in a bike i have a few months ago but couldnt finish it till now, and when doing the setting up i looked up the exhaust ports and to my amazment the power valves were 180 degrees out !!!!!!!  . and it must have been running like this because the carbon build up wouldnt let them spin back to normal postion so had to clean them up first... must have ran shite,the engine had been fitted in a aprillia rs125. what a knob....... now its fixed and runs great i bet he thought it was knackerd. ;D |
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vensac
Weekend rider
Posts: 91
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Post by vensac on May 16, 2010 12:19:14 GMT 1
Just taken the barrels of mine , not sure now but I think mine may have been the same.
Its off for a re-bore.
If it was fitted 180 out , I presume the symptoms would be loss of top end power?
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Post by guiri on May 16, 2010 23:04:38 GMT 1
yeh vensac i recon it has no chance of making any top end power like that and probably run bad full stop.
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Post by Norbo on May 17, 2010 10:37:34 GMT 1
its more commen then you think mate . But normaly people reolise what they have done and re do them . LOL he must have been thinking it was a crap and slow and no good and all the time it was just his mess up on the valves LOL what i div
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cooler
Thrash Merchant
Posts: 490
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Post by cooler on May 17, 2010 15:51:34 GMT 1
many moons ago i timed my rd200 180 degrees out and it went backwards  my mate was on the floor pissin im self, threw the bike in the shed went to the pub and got pissed ,,,, them wer't days, ;D  |
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Post by guiri on May 21, 2010 3:19:35 GMT 1
many moons ago i timed my rd200 180 degrees out and it went backwards my mate was on the floor pissin im self, threw the bike in the shed went to the pub and got pissed ,,,, them wer't days, ;D nice one...lmao. iwent for a spin on it today an it flys. ;D has top compresion but makes a strange gurgley noise on tic over,might be water pump or something in the gearbox...it did have two stroke oil in the gearbox..no joke.... |
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Post by 4ce on May 28, 2010 21:33:10 GMT 1
Had my powervalves apart last week, got me worried now. If I look into the exhaust what position should the valve be in?
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on May 28, 2010 21:45:57 GMT 1
I think I am right in saying that when you have joined the valves together, the heads of the screw on the joint should be facing up. If they are facing down they are on the wrong way round.
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Post by 4ce on May 28, 2010 22:03:12 GMT 1
Thanks for the advice.
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