Re-Aseembly of TZR125 Motor

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

I am getting my cylinder back on Monday or Tuesday. It will have been re-bored ready for the new piston.

Now my question to you lot is...

What can you recommend me to do on the rebuild procedure.
I've built a 4 stroke bike engine (my CRF Fiddy engine), And this will be the first 2 stroke engine I've built.

I've already checked for play in the conrod. There is left to right play, But absolutely no up/down play at all. This is right isn't it?

I've cleaned all traces of gasket from the block, And the bottom & top of the cylinder.

All water ways are clear.

Cylinder head, I have polished up, cleaned up the face with some autosol. Everything is good.

Should I oil the piston or cylinder with anything as I assemble the top end?

And can anybody get me the torque settings for the head stud nuts please?

Thanks in advance

Ben

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

oil the moving parts with 2 stroke oil. thats crank, small end, piston and barrel.

the head and barrel are held on by M8 studs right? should be about 25nm then.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!! Mr. Green

Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Cheers matey. Isn't this cylinder just an RD250 cylinder? of course, the RD engine has 2 of them.

Ben

ms51ves3 · Super Spammer Joined: 07 Jun 2007 Karma :

It's probably more similar to half of a TZR250 engine.

binge · Emo Kiddy Joined: 02 Jul 2004 Karma :

Thats the one! In fact, I know its half of a TZR250 engine because I remember somebody on here who used a 250 cylinder on his 125.

Billing · World Chat Champion Joined: 12 Mar 2009 Karma :

I'm now about to have my tea, what I'll do is as soon as I've finished is go find you the torque settings for the cylinder and head. Be aware that it's really difficult to get a torque wrench on the cylinder bolts Evil or Very Mad

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'84 TS50X, '91 TZR125, '89 CBR400RR, '91 VFR400R NC30, '98 R1
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Philious · Brolly Dolly Joined: 28 Jun 2005 Karma :

I've just checked in the haynes DT + TZR 125 and it says Cylinder head nuts 2.2kgf m or 16lbf ft

Cylinder barrel nuts 2.8kgf m or 20lbf ft.

Hope this helps
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Previously; Honda XR125 - Yamaha DT125r - Aprilia Rs125 - Suzuki GS500e, Currently; Kawasaki ZX6R + ZX10R
Theory : Passed 28/7/09 Module 1: Passed 21/09/09 Module 2: Passed 23/09/09