Inazuma Posted July 14, 2020 Share Posted July 14, 2020 On 1st cylinder got 8bar rest around 12-14. Head been teaken off and rebuilt, and still comp not much change . I found small marks od sleves. Od this od the end of pistons. Do I have any other option? Quote Link to comment
Gixer1460 Posted July 14, 2020 Share Posted July 14, 2020 What's going on with those valve cut-outs? Quote Link to comment
Inazuma Posted July 14, 2020 Author Share Posted July 14, 2020 (edited) That's becouse I use Dot head, that been skimming. So to keep 0.80 thu clerance Valve/piston I done some dremel action. Any way, I did not even fire it up. I also use Ramair filter on cv38. I think all that could bee resoult of less restrictive filter. Becouse I use Dot head my options list is short. What you will do ? Edited July 15, 2020 by Inazuma Quote Link to comment
richyrich Posted July 15, 2020 Share Posted July 15, 2020 Piston rings ? Comp test with oil squirted thru plug hole , would it change ? Quote Link to comment
Gixer1460 Posted July 15, 2020 Share Posted July 15, 2020 22 hours ago, Inazuma said: That's because I use Dot head, that been skimming. So to keep 0.80 thu clearance Valve/piston I done some dremel action. Any way, I did not even fire it up. Whatever clearance you think you have, it 'looks' like the valves have touched! If it hasn't been started, you may have some bent valves. Freehand Dremelling valve cutouts isn't the best way, a milling machine and fly cutter is recommended just for accuracy and equal cuts. Quote Link to comment
Inazuma Posted July 16, 2020 Author Share Posted July 16, 2020 9 hours ago, Gixer1460 said: Whatever clearance you think you have, it 'looks' like the valves have touched! If it hasn't been started, you may have some bent valves. Freehand Dremelling valve cutouts isn't the best way, a milling machine and fly cutter is recommended just for accuracy and equal cuts. Yes I was aware of that. I did chek every single Valve. Takes 3 times of the head. I done oil squirt in pług hole also. Comp rais to 9. Shot I found youse bandit pistons. Is it worth doing it.? On 2 days I it will be sorted. Quote Link to comment
richyrich Posted July 16, 2020 Share Posted July 16, 2020 Might be just the rings want changing not the pistons . Strange that it's just low on one. Maybe it is a bent valve not sealing , maybe blow-by at the gasket. Every single part needs measuring with micrometer and checking to spec in the manual , the evidence will be there Quote Link to comment
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