Engine swapping.

[florence]

Does anyone know if the cb450/cb500t engine will fit into Cb350 K4 frame?  The bottom half crankcases look to same.  I have been looking on the internet to try to find another person mad enough to try but so far no luck.

[Bryanj]

I think its too tall, but have never tried it. Any particular reason apart from a surfit of odd bits?

[florence]

I have a 1972 cb350; it's a great runner but I find it a bit under-powered.  I was just thinking of a fun project to make something with a bit more go but still very cheap.  I guess there may be insurance problems....?

[K2-K6]

There's a lot of that type of engine now raced in classic era stuff so some info should be available about compatability from that field i guess.

Maybe even a cam and carbs upgrade to make it rev a bit possibly? any 360T stuff to get closer to 500 power, don't think it was that quick antway.

[Bryanj]

360 stuff dont fit the old 350 it was a majour engine re-design

[florence]

Thanks, but it already revs like mad and for it's size it is quite powerful.  The main problem is that it is just a small bike and I tend to thrash it a bit too hard.  When it was my main bike I used to wreck the big ends by riding it flat out all the time.  They are a lovely bike to ride on country lanes, I think I just wish they had made a 500+ version of it because then it would be my perfect bike. 

I think I have now decided to get the MOT up to date, ride it for a bit and then if I still find it too small, put it up for sale and see what it fetches and put the funds into my T100 fund, unless a cheap 500t engine turns up, then....out with the hacksaw and welder....

[Bryanj]

Please not a 500T you would regret it forever!!!

[florence]

OK, no 500t, thank you for calming me down.