took barrel off today on other engine- suprised to find a 0.50 oversize pro-x piston. Anyone have any experience of these? gonna upload some pics as there are some scores down piston not deep ones and very slight marking in barrel. was going to for a rebore hence taking barrel off- but may get away with hone instead of rebore??? hopefully.
rings all intact not port damage at all looking at pics just some odd marks...thoughts please? was also covered in lot of carbon too -so was prob running rich?
if the pistons that bad the bore will need boring, honing wont remover the minute score marks and the rings wont seal proply, loose compression big style mate
cheers pal..not forgotten about you either mate :p all bottom end stuff is here and all packaged up. got 2 barrels to sort tues and hopefully get you on case for other engine.
Currently at engineers now gettin 2 barrels rebored and 1 jap piston kit and head gasket and the other is having Taiwan piston kit. Not bad for £124. Even doing it while I wait!
well after waiting an hour, got 2 barrels bored out to 1mm- 1 jap piston kit(tzr stylee) and the other matika piston kit. Qualtiy service from Grampian Motors- just turn up and they sort- had everything you could possibly need for engine rebuilds.
only thing they didnt do was the powervalve mod- and he did advise me that it will need doing on both barrels..any good quality tips to do it please? he advised to mark off with pen and take file and follow the contour but take no more off than needed??? some instructions with piston kit to follow but if anyone got some other tips be great?
norfe mate no fusckin about now .....what is the min champher you would expect on a fresh top ? get some better pics of the jug coz more than 1 said bout the ports looking sharp ,we dont want u to eat a new bore /piston
-- Edited by GADGET on Tuesday 8th of January 2013 03:51:48 AM
dont look like much chamfer on the ports tho, should be a nice 45 degree angle on the edge of all the ports especially the top of the exhaust port with its size across the bore
Currently at engineers now gettin 2 barrels rebored and 1 jap piston kit and head gasket and the other is having Taiwan piston kit. Not bad for £124. Even doing it while I wait!
WHAT HEAD GASKET YOU GOT
U WANT EITHER GENUINE OR AN ATHENA 1 OFF EBAY MATE
not be riding for at least 2-3 weeks yet :p... still lots on list- need to sort some clear tubing for oil pipes and fuel line, and get original exhaust welded or find a cheap and nasty dep pipe. and tidy up the frame- bits of paint worn off so gonna spray with can -as i cannot be bothered to sttrip for powdercoating... wouldnt be able to remember where everything went even if i had pics lol
thats what a camera is for, no point rushing things ull only have to do it again 3monthsd down line, may aswell pc it and it will last you out ....dont be lazy ha
I hear what your saying, loved tge surge you used to get when I had last one pegged open.but want to keep this for work ideally dont want to be screaming everywhere lol
-- Edited by dread123 on Tuesday 8th of January 2013 09:57:59 AM
So I can use a small precision file to just increase the chamfer? Do I lube with oil whilst working? Will attempt by hand and do power valve mOd as well. Any tips?
it doesnt do any harm my last engine had just under 30k on the clock with the pv locked open and i had done 26k of the miles with out a problem and av just ran my 200 in with the valve locked 800mile and no problem yet
any tips on how long to clean this barrel before i reassmeble?? done the powervalve mod and washed barrel in soapy water 3 times and lubed barrel with 2 stroke, not sure if ready ??
It might just be the pic ? But it looks like a small amount been chamfered so maybe wet n dry it around with real fine grit ,u won't damage the bore coz it will have the rough honed surface anyway and it's cheap to do
