piston rings have gone and little end

[mgs41987]

its a honda clr 125cc single cylinder 4 stroke, went down to local engineering workshop, they said i will have to supply my own piston and give it to them so they can work out the dimensions of the re bore as little damage has been done can anyone recomend a size piston wouldnt mind going bigger cc maybe 150-170 depending on what i can find if anybody could point me in the right direction would greatly appreciate it

bore and stroke is 56.5 x 49.5 mm (2.22 x 1.95)

if anyone can help with me finding a cylinder kit would be very grateful

[P.]

There is no upgrade to these... you can only go 1mm oversize and will need the cylinder to be bored out to suit.

https://www.startright.co.uk/index.php?main_page=product_info&cPath=458_527_99_16&products_id=74108

While you are there, get rid of the useless excuse for an exhaust. If you are good at welding, you can remove the rear half of the exhaust (after downpipe, just before HUGE silencer) and fit a nice pipe and end can. Will help it breathe a bit easier... check the jetting of your bike though.. as I'd also upgrade the air filter in there.

All of the above was going to be done to my last CLR but I had to sell it in the end, was going to budget about £150 to sort it all out

[mgs41987]

so couldnt i go any bigger the engine is based on a xlr

[P.]

[mgs41987]

fair enough thanks any way

[P.]

Curious... what is a part of the reg number of your CLR? I sold mine not that long ago and rarely see them about

[mgs41987]

[MickC]

It might cost you a bit more but try to find a company that specializes in re-bores. If it's done wrong you could end up with a right-off for an engine and at the very least an expensive (probably beyond the value of the bike) re-build.
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[Fizzer Thou]

[Mikey CB500]

If its a CG 125 piston then you should be able to bore the standard barrel out to atleast 2.5mil oversize which would give you a boost in torque. Its not practicle but if preformance boost is your only aim then it should be possible.

Althogh 2.5mil is the maximum overbore and if it ever got that damaged that honing wouldnt clean it up then youd need either a resleve or new barrel.

[humanbeing]

[mgs41987]

[P.]

Can only find 1.5mm

https://www.ebay.co.uk/itm/NEW-HONDA-CG125-CG-125-PISTON-KIT-RINGS-78-00-1-50mm-/230443912671?pt=UK_Motorcycle_Parts&hash=item35a7870ddf#ht_1457wt_754

Although photo looks far different to the CLR piston I had, had valve recesses on the piston crown.

[mgs41987]

[P.]