Looks a beast.
Nearest to a project I've done is fit a 640 engine into my 620 KTM because the original had started to weep oil a bit from here and there. Found a dirt cheap 640 (the clue should have been in that fact) with an oil leak 'probably from the cracked sight glass' was how it was described.
When it was delivered by courier I found the sight glass wasn't cracked and had to fit it in the bike to run it, and find oil leaks from the base gasket (constant slow dribble) output shaft oil seal, kinked copper washer under a banjo bolt and an internally damaged braided oil hose.
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But yeah it was perfect apart from the cracked sight glass ! Replacing the base gasket revealed a broken oil ring at the bottom of the piston too.
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It only really cost a gasket set, piston ring and cheap seal so still a bargain, and it has a high flow head so increases in throttle in 1st gear makes it want to flip over backwards
. I can't wheelie , intentionally, very well, but I'm getting plenty of easy practice now !
Nearest to a project I've done is fit a 640 engine into my 620 KTM because the original had started to weep oil a bit from here and there. Found a dirt cheap 640 (the clue should have been in that fact) with an oil leak 'probably from the cracked sight glass' was how it was described.
When it was delivered by courier I found the sight glass wasn't cracked and had to fit it in the bike to run it, and find oil leaks from the base gasket (constant slow dribble) output shaft oil seal, kinked copper washer under a banjo bolt and an internally damaged braided oil hose.
Â
But yeah it was perfect apart from the cracked sight glass ! Replacing the base gasket revealed a broken oil ring at the bottom of the piston too.
Â
It only really cost a gasket set, piston ring and cheap seal so still a bargain, and it has a high flow head so increases in throttle in 1st gear makes it want to flip over backwards
. I can't wheelie , intentionally, very well, but I'm getting plenty of easy practice now !
<p style="text-align:center;">Ohlins, PC3, fuel cut defeat, +4deg timing, 17" front wheel.