Bore/hone to 1st oversize. Recommend a garage/workshop

Boskowski

Hello all,

As the subject line suggests my XT500 single cylinder might need some work done soon enough. Oil consumption is up, compression is down. Mileage unknown. Engine is orig XT but not matching w frame number.
It's still ok but will need doing after the summer
Anyone who can recommend a good garage workshop for that kind if thing? Preferably south east.

Thanks

blu3r0ri0n

I have often dealt with with Two wheels r us in bagenalstown, carlow. and can recommend them. http://www.twowheelsrus.com/
Also there is Baldrick's Motorcycles in Kilkenny, http://www.kilkennycityonline.com/baldricks-motor-cycles-ad.html

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Hotblack Desiato

Might not be the bore, could be a burnt valve or similar, and worn valve guides would put the oil consumption up. Head gasket could be leaky too...

CJhaughey

Might just need a hone and new set of rings and a topend refresh as Ninja says.

Boskowski

Ye're right, I' making assumptions. Best have a look then first. Thanks.

rolliepoley

Save yourself some time and money and source yourself a good known low mileage engine and stick it in.

CJhaughey

rolliepoley wrote: »

Save yourself some time and money and source yourself a good known low mileage engine and stick it in.

Maybe easier said than done with that engine, last made in 1981?
2 valves simple job.

Hotblack Desiato

Oversize piston and rings and new valves and valve guides (if needed) may or may not be easily sourced either.

Hotblack Desiato

Not making assumptions is important. My first bike was a 100cc 2-stroke, after a while it started smoking very heavily. Haynes manual and everything else I read said that this meant worn bore. Got it rebored and new piston and rings, no dice. Turned out someone had undone the primary gear and not put the lockwasher on it properly, the nut loosened and started grinding away at the crankcase, eventually gearbox oil was able to leak out and get sucked into the carb causing the smoke. New lockwasher and a second hand right hand half engine casing sorted it.

CJhaughey

ninja900 wrote: »

Oversize piston and rings and new valves and valve guides (if needed) may or may not be easily sourced either.

There is a huge aftermarket for XT500 stuff especially in Germany.
Valves are about 30 ea intake and exhaust. Viton stem seals are less than 10 for a pair. Valve guides about 30 ea.
Piston Kit 200euro

gctest50

XT500, now in 600cc form. 95mm CP piston, bigbore sleeve, enlarged engine casing, Dellorto 41mm carb, bigbore cam, 49mm inlet valve, stiffened valve springs, barnett clutch fritcionplates, Magura Hymec hydraulic clutch, KEDO digital programmable ignition, 12V conversion, 2005 KTM front fork, KTM frontbrake, Wilbers rear shocks, profab swingarm, Excel rims with stainless steel spokes.

https://www.youtube.com/watch?v=SA45g6K2heU

CJhaughey

gctest50 wrote: »

XT500, now in 600cc form. 95mm CP piston, bigbore sleeve, enlarged engine casing, Dellorto 41mm carb, bigbore cam, 49mm inlet valve, stiffened valve springs, barnett clutch fritcionplates, Magura Hymec hydraulic clutch, KEDO digital programmable ignition, 12V conversion, 2005 KTM front fork, KTM frontbrake, Wilbers rear shocks, profab swingarm, Excel rims with stainless steel spokes.

https://www.youtube.com/watch?v=SA45g6K2heU

But stock standard ones are worth more.

Boskowski

CJhaughey wrote: »

But stock standard ones are worth more.

My one is stock standard 1979 with a very few essentials mods like 12v H4. And I really love the bike and she'd be considered not showroom but pretty darn good. But to be honest worth more or not if this guy offered me a swap I'd probably take his arm off.