If you have read the thred it tells you that Novarossi engines are made to have 0.008" head clearance withoutshims so if you have 0.028" more it is way over shimmed. I have just one 0.010"shim in mine.

The very thin shim must be the 0.005"shim as they make that one

Cheers

BT,

Here's the nominal measurements of the standard Nova shims.

Silver: 0.3mm - or about 0.012 inch.
Copper: 0.1mm - or about 0.004 inch.

1mm is equal to about 0.040 inch - it's actually 0.039 . . . something, but close enough for this purpose.
Yes, you'll need a digital caliper. ;)

Where can i get a barrel carb for an NSR S3? I need 2!

Cheers

thanks guys! ill take one of the shims out this weekend and give it a go then keep taking them out and see what happens i goto learn!!!

Hey Gav
thanks for clearing up one thing with the mm's and the inches :lol:

how do novarossi engines come out in terms of shims installed when the engine is new?

No problem.
I think our NSR came with one silver shim, but if I recall, the older Nova's came with a silver and a copper fitted as stock. I could be wrong here.

that sounds about right! thanks Gav

I t is said that the piston of Novarossi new version .12 engine is made of ceramic alloy. I s it true?

And which piston is better?
ceramic?
CNC aluminium ?
microcast aluminium?

I had purchased a IDM 12 3 port a couple of months ago and had major problems with it since day one. No matter what carb setting it would alternately overheat or stall or run poorly and would destroy plugs at an increadible rate. Well yesterday i checked the rod and it was quiet worn so I figured it was detonating from conrod bushing play. Pulled everything apart and to my shock found that NO shims had been installed from the factory!:eek: I was effectively .4mm less head clearance than factory . The engine is toast now... p/s is fried/ head button is pitted to hell....crank and bearings are ok though. What should I do? I was going to go to the store that i bought it at and also mail Muegenseiki japan. Do you think I have a claim or not?

sorry for the novel.:(

As far us I know der is no warranty on the engine.

I wish I knew what to do about having an engine that had a rod installed backwards from the factory... pretty sweet.. my mt12 wore heavy on one side of the sleeve.. 2.5 gallons and won't idle.. grr

carb question
 

Hiya,

Could anyone tell me if it possible to replace a carbs from a NSR 12 3 ports with a carb from a 15 size engine from the same make ? Will any mod be needed ?

Thanks

RS12 T5S1
 

Hey Guys,

Can anyone tell me what the carb settings are for the RS12 T5S1

and can anyone suggest some glow plugs (turbo Plugs)

thanks

Re: RS12 T5S1
 

Hi someone suggested to me for my RS 12 S5
5 turns out High speed screw
3 turns out low speed screw
good to get it started.

or you can try
2.5 turns out low speed screw
and high speed screw sitting flush with the highspeed screw body.

Also guys could i ask if its possible to use a OS .12 carb on my RS12S5 ? would it make any benifits in terms of easier tuning etc...