FlaFFy_91
Premium Member
Registered: 30th Sep 08
Location: Formby, Merseyside
User status: Offline
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Bit of tech info basicly
Friend of mine popped his rs125 engine so bought a new one
He wants to keep the head and top end off his old engine for some reason
Basicly what i wanted to know is do they work off things like stretch bolts that need replacing each time you remove them on the head?
Or if hes swopping the head does he need to replace anything other than the gaskets obviously
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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I'm sure the reason he wants to keep the head is because the earlier bikes had slightly more power and if his his an earlier bike then there you go.
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FlaFFy_91
Premium Member
Registered: 30th Sep 08
Location: Formby, Merseyside
User status: Offline
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there you go then thats probly why then. Dont know shit about bikes tbh haha. Do you know if he has to replace anything (other than gaskets)?
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Graeme
Premium Member
Registered: 26th Jul 04
Location: Northampton
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Just gaskets normally.
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
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Piston rings if its a 125, mine went so many times it was untrue!
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
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quote:
Originally posted by Phillips_91
Piston rings if its a 125, mine went so many times it was untrue!
Should of let it warm up before riding it. Mito's are better anyway.
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Sunz
Member
Registered: 12th Jan 07
Location: SE England
User status: Offline
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Ah 2 strokes, they are the future, so simple !
Only did gaskets on the ones I replaced but you might as well do rings as it's simple simple stuff.
Never even bothered to get the correct torque settings for the bolts, just as long as they were tight it was good.
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colonel_g
Member
Registered: 11th Jan 09
Location: Thame
User status: Offline
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if you doing the rings might aswell whack a new piston in it too.
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brynalar
Member
Registered: 24th Jan 12
Location: Kettering
User status: Offline
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What happened when the engine 'popped' ? cos if it was main bearings/ crank then head/ top end may be damaged too...
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
User status: Offline
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if you use decent fully synth 2 stroke they dont do rings half as often. i done 10k on my tuono 125 and it was absolutely mint!
Just go to grampians in waterloo and grab a top end set and some rings. Easiest things to build ever mate.
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FlaFFy_91
Premium Member
Registered: 30th Sep 08
Location: Formby, Merseyside
User status: Offline
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i say it popped, basicly the gearbox was fucked, wouldnt rev above 5k and then if it did it sounded like a f1 car then it started seizing up and he still kept riding it into the ground and i think to be honest hes just worn the feck out of the bore and the rings as theres no compression and no way of it starting any more
yer gaz ill send him down
ive heard little end bareings are the main thing to do if your changeing it as they go quite easily
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
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i'll build it for him
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FlaFFy_91
Premium Member
Registered: 30th Sep 08
Location: Formby, Merseyside
User status: Offline
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not a hard thing to do though is it mate. If we get stuck ill bring it down to yours to get it sorted maynn
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Phillips_91
Member
Registered: 20th Jan 10
Location: Blackpool. Drives: Sapphire Black Mk4 Astra 1.8
User status: Offline
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quote:
Originally posted by corsadonk
quote:
Originally posted by Phillips_91
Piston rings if its a 125, mine went so many times it was untrue!
Should of let it warm up before riding it. Mito's are better anyway.
It was alwasys warmed before riding, neighbours hated me, i'd be out half an hour before goin out in the morning firing it up and it had an arrow race can on it! 
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
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Its bad oil that kills 2 strokes and too many revs when cold.
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richc
Member
Registered: 24th Mar 07
Location: Ilkeston
User status: Offline
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quote:
Originally posted by 3i_gaz
Its bad oil that kills 2 strokes and too many revs when cold.
I use to put a cap of 2 stroke in my petrol aswell. And let it tick over whilst putting my gear on. 17k miles in a year and abit on a 50 with a 70 bore kit 
Never had a problem though an it got death everywhere.
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
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It just fouls the plug too much oil the right mixture and decent quality and you wont need any extra 
Need to do plug checks every couple of thousand to see how its running imo always jelps
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sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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I would tell him to bin his oil pump and pre-mix the petrol as they seem to always fuck up.
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reecegsi
Member
Registered: 16th Mar 11
Location: birmingham
User status: Offline
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When i done piston on my mx i changed nuts gaskets and plug also piston and rings and it was fine with the bore kit and race exhaust and big carb thing fecking was rapid lol
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Tom G
Member
Registered: 4th Aug 08
Location: Cheshire
User status: Offline
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Serious question, if im 21 and pass my cbt, would i be able to ride 33bhp bikes?
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3i_gaz
Member
Registered: 29th Nov 07
Location: Liverpool
User status: Offline
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Nope not on a CBT
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