How to put a piston in a minimoto

[Alpha-9]

Having trouble getting the piston in the cylinder, youtube shows me ring compressors for bigger pistons, is that my best bet or is there a secret technique?

Also should the arrow be facing the exhaust right?
And which way do the rings go when you put it into the cylinder or doesnt it matter?

Is a little crappy chinese minimoto i've got laying around
Something to do, got the week off work
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Fzr-600 1999

[The Artist]

Small piston rings can be squeezed into the slots using your fingers and you should be able to wiggle it into the cylinder.

Arrows face the exhaust yes.

The piston may have notches so the rings can only go a certain position or they may be free floating.

[MarkJ]

Can also try a coke can and jubilee clip if your fingers don't do it.

[Alpha-9]

Bam snapped the ring
Goddammit, every time
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Fzr-600 1999

[Islander]

Make sure you set the ring end gaps before you try to fit them and make sure you space the gaps when you fit the rings to the pistons.

[The Artist]

[sickpup]

[Islander]

The tools I always used were a feeler gauge set and the bore itself. I haven't fitted a set of rings for yonks though so maybe they don't need gapping any more although IIRC my Hornet manual mentions them, the Zephyr manual definitely does and I'm fairly sure the Monster manual does too. I'd still check them for peace of mind anyway.

[Pete.]

Feeler gauges and a EZE-LAP to set the ring gap.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[jimspeed]

cable tie around the piston to hold the rings tight, if it is 2stroke then they usually have to be the correct way up too as they seat around the pin that stops them turning and getting mashed by the ports, keep some cutters handy so once the rings are in the barrel you can cut the cable tie off em.
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Hyosung cruise 125(passed test on, sold) Kawasaki el 252 (better than expected but sold on) Kawasaki GPZ500S first "big"bike.(sold) ZZR600 E5..Z750 2007,ER5, currently on a 2008 Enfield bullet electra x and loving it..
,"Alpha-9: Is there any correlation between dyno rod and dyno kits?"

[Alpha-9]

Wahay, got it in.
Had to get some new rings off ebay but got them on without fucking them and without taking the piston back off as gudgeon clips are pains in the arse and love pinging off around my bedroom!

All back together now minus the tank, will be very surprised if this works mind
I don't get how you're meant to bed the pistons in on a pull start engine without wearing them, will just go for it once i've got some fuel...have put a thimble of 2stroke oil around the cylinder and piston before installing to make sure it's nice and lubed

Think I put the piston on backwards thinking the exhause went underneath so i've put the cylinder head on backwards to match the piston
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Fzr-600 1999

[lihp]

Just remove and refit correctly. Far less hassle in the long run
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covent.gardens: lihp is my most favourite member ever

[P.addy]

Wut.

Put the tools down

[Alpha-9]

Tool*
A single allen key is all you need

Seems fine, has as much compression as it used to, just needs fuel
This crappy loud useless thing WILL live!
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Fzr-600 1999