hey hey

has anyone ever heard of putting an nc24 engine in an nc30 frame with nc30 carbs
i heard guys that race on track do this because the nc24 has a shorter 1st gear

does the nc24 engine have better performance over the nc30 engine?

would like to read your guys comments

Not heard that before, and I don't think that the 24 engine goes easily into the 30 frame.


You don't want a lower gearbox for racing, you want a closer ratio gearbox (nc30).

Usual racer combo is a 35 engine with a 30 gearbox. Carbs are up the individual, 30 carbs will make higher top end hp, 35 carbs are much easier to setup and will be near identical in club racing.

No - you'll be thinking NC35 engine which is pretty much the same animal and is an easy fit.

The NC24 is a 400cc V4 but has a 180 degree crank for starters

CMSMJ1 wrote:No - you'll be thinking NC35 engine which is pretty much the same animal and is an easy fit.

The NC24 is a 400cc V4 but has a 180 degree crank for starters

It's still an NC13 Engine though so I doubt the mounting points are that different

I'd prefer the 30 frame over the 24's though given the choice.

The NC35 has a different mounting points as the frame was changed to alter balance.

If anyones got a picture of an NC30 engine i'll measure the mounting points on an NC24 engine as they 'look' like there in the same place as the 30 engine

The difference fwiw between the 180 and 360 crank is the 180 is smoother, the 360 or 'big bang' gives very slightly more power[1] but more to the point it gives the tyre more time to recover in between power pulses.

Druid

[1] As in 2hp out of the 750...

Neosophist wrote:If anyones got a picture of an NC30 engine i'll measure the mounting points on an NC24 engine as they 'look' like there in the same place as the 30 engine

Well there is this one

from http://www.400greybike.info/newforum/vi ... 62&t=11723" onclick="window.open(this.href);return false;

Druid

lol, looks v familair. someone's nicked the bike from around it

Apart from the mounting hole by cylinder 3 there isn't much difference. Shouldn't be too hard to fit the engine in :)

The 180 firing order also seems to run cooler (only 1 rad needed) both bikes produced 60bhp too so *shrug* :)

The nc24 rear exhaust headers might not fit into the 30 frame very easily, hard to tell.

Stickshift wrote:The nc24 rear exhaust headers might not fit into the 30 frame very easily, hard to tell.

If your putting it in a 30 frame use the 30 exhaust