Berlina

[innathyzit]

Originally Posted by Padmei

Thanks Woodman. I have been using a piece of plastic conduit but will grab someone to hold the piston steady.
Do you still have your measuring devices & if so would you mind if i brought it round for you to measure (I can look at your lounge lites at the same time) I prob won't bother taking the pistons off as there doesn't seem to be any reason to unless they're stuffed & i also thought they'd come out easier than this.

All I have in the way of mics (measuring devices) now is a 0-1" and a 1-2" and no internal ones at all so no good for your bike sorry.

If the pistons are not scored or gouged its generally safe to say they will be ok. Check to see if the rings are snug though.

[Voltaire]

Heat up the pistons with a heat gun, I've always wanted a proper pin removal tool but always use the 'tap' method...usually with a socket of the right size. I bought a ring expander, makes life easier...
Are you cylinders not Nikalsil? 81 on...?
They just need new rings...Nikalsil only rings I think.
Motobins have R65 cranks on special if you wanna have a spend up.
We put the r90 back together with the original pistons, clearance was borderline to spec but runs fine....makes you wonder how many parts are changed that are ok.
My mate got his local clutch place to refurbish his clutch, surfaces ground and new clutch plates.....( I know....not how its done ...)

[Padmei]

Brmmm brrrmmmmm brrrrrrrrrrrm.

Sorry... just remembering how it sounds

As you were

[igormortis]

Hold on to that precious memory...

[Padmei]

Timing chain & general going over thread

http://advrider.com/forums/showthrea...3#post18907163

[Voltaire]

just reading your other post.
The r65 clutch is the same as the rest as is the box.
I have an r65 bottom end I was looking at putting r60 cylinders on....as the crank has a shorter throw...61mm I think vs 71 or there abouts.
However the cam is different as the angle to the pushrods is different coz of the stroke.... R60/80/90 etc cylinders wont line up as it...
If you could get the pushrod tubes to fit the pushrods probably foul on the tubes.
I know about dead end projects....spent a looooooot of time and unfortunately money on the R50 racer.....at least 3 sets of heads, set of 500 cylinders, shortened 600 cylinders and welding.....
Once I passed on the 500 and went 900 it was easy.....just saying...still got the r65 case/crank/rods as no one wants them....although my view has now changed.

[Box'a'bits]

Seen this yet? How much did you want to spend?

[Pete-NZ]

Padmei..
don't hit / don't heat it...
make a puller... they are simple..
a length of pipe the pin will fit in...
a length of threaded rod....
a thick flat washer / plate with a hole...

put the tube over the pin... washer on the end of the pipe... threaded rod though pipe / washer & pin....
nut on each end... wined it till the pin is in the tube...
PS... make sure the nut fits in the pistons pin boss with clearance...

[Padmei]

Thanks Pete. I was thinking from where to 'lever' a puller & the overpipe is an easy idea. it's at the mech at the mo but won't bother pulling it off now - I'll just push it back in.

Nutso - interesting read but looks pretty horrible to me TBH. I might just get the hacksaw onto the 1000 cylinders anyway make them fit - glue up the holes & grind the pushrods down to fit.

[Box'a'bits]

Originally Posted by Padmei

Nutso - interesting read but looks pretty horrible to me TBH. I might just get the hacksaw onto the 1000 cylinders anyway make them fit - glue up the holes & grind the pushrods down to fit.

Wasn't the look ( I agree with you BTW), it was what they did with the engine that was interesting - and the eventual output.

[Padmei]

Originally Posted by Box'a'bits

Wasn't the look ( I agree with you BTW), it was what they did with the engine that was interesting - and the eventual output.

Yes a big bore that revved its' tits off - can't be a bad thing.
Interesting final drive on that spaceframe bike.
Are they lightened cam followers ppictured in that exploded engine? Would be interesting to know what dimensions the pushrods were & how the barrel looked compared to a stock one

[Box'a'bits]

Originally Posted by Padmei

Are they lightened cam followers pictured in that exploded engine?

Nope, looks standard-ish. These are out of Gus

Originally Posted by Padmei

Would be interesting to know what dimensions the pushrods were & how the barrel looked compared to a stock one

Yup

[igormortis]

Originally Posted by Padmei

...looks pretty horrible to me TBH.

I disagree, of course!

And would you guys just quit it? All of this talk is undoubtedly driving up the value of R65s - they’re supposed to be unloved, unwanted, and picked up for next to nothing goddammit!

[Voltaire]

Got a question for you.
After riding the R65 for a while I was wondering if it could be sleeved to 500cc?
Do you think the valves would clear a bore that was 72mm instead of the 82?
R45 valves are inl- 34 ex- 32 VS r65 whopping in-40 ex- 36......( 40mm valve on a 32mm carb....)

I have ruled out buying a 350 Ducati as the one on TM has hit 8k and not met reserve....

[Box'a'bits]

Originally Posted by Voltaire

Got a question for you.
After riding the R65 for a while I was wondering if it could be sleeved to 500cc?
Do you think the valves would clear a bore that was 72mm instead of the 82?
R45 valves are inl- 34 ex- 32 VS r65 whopping in-40 ex- 36......( 40mm valve on a 32mm carb....)

I have ruled out buying a 350 Ducati as the one on TM has hit 8k and not met reserve....

My understanding was that the R45 was just a sleeved down R65 engine. The R45 was for German licencing & insurance purposes, & had a limited power output (27ps?). They were sssslooooow.

The test would be looking at the part nos however.