Pure acceleration

[dangerous]

Alan from Fast and Safe??

never been into that thread, but I'd think not.

[TwoSeven]

Well 27, it appears the only bit of info you've posted that we all agree on is your signature!

Tell me, in all seriousness, do you know if a 92-95 CBR900RR fits into a CBR600F2/F3 frame? I know anything can be made to fit, but I seem to recall mention that the engine sloted straight in, the rear mounts lined up an only the front frame hangers had to be spread and new front mounts made up. Do you know if this is correct? Do you know of anyone wwho has attempted this mod?

I think there was a pic of one in an early PB mag but.

The engine will go in but it wont slot straight in (to an F2 frame) as such, the 900 was an inch or two wider than the 600 frame, but otherwise all the other dimensions i'm told are the same. You can put them in, but you need to mod a couple of the mounting brackets and put a kink in the top of the frame to make room for the rocker cover otherwise you cant remove it from the engine when its in the frame (the frame goes over the top of the rocker cover - there is a little arch each side to put your hand in to get at the plugs. The top front of the rocker cover almost touches the rad, and the rear of the rocker cover, isnt too far away from the spar that the coils are mounted on.

I'd also check out the rear tension bolt (the top rear mounting bolt), that would be the other bit i'd query. From memory both engines are the same dimensions other than the height and width of the cylinder head - although i've never actually measured them both up.

Dont know about the F3 frame, I only have an F2 and looking at the parts manual it seems some of the engine cases are different - so without being able to measure it up, couldnt tell you what needs to be done. With the F3 they started buggering with the width of the bike, so it may just be too narrow.

Dont really think its a good idea either. The F2 chassis has a lot of twist in it and putting in an engine thats about 40bhp more would probably make it not a very good ride in the corners (although I've always preferred the F2s flex).

Just quickly putting a tape measure on (so not very accurate) the F2 frame has a 40cm gap between the front mounting brackets (and the engine has a spacer either side). The middle upper brackets are about 32cm apart (there is a small triangular bracket that bolts to the frame and the engine is attached to the bottom of that bracket), the rear upper is 23cm (goes straight thru the frame) and the rear lower is 25 cm (also goes thru frame). I just stuck my tape measure in and had a look, so dont quote as accurate.