550 bore out - will it work ?

HI

Some of you may know I'm planning a Radian engine transplant into the 550..

Easy -huh ? Well not without obstacles I discover but hey all fun.

One problem I have had is water damaged bores -seems that in rainy England everyone wants to store their spare enines outside :? Result = seizures and pitted bores.

So I've been trying to figure a way to source OS pistons for teh 58.5 dia bore of the 600 engine, say 59mm or even 60mm but no dice. At least not for less than about 500 US..

Then I had a moment of inspiration. Why not take a shagged 550 barrel set and bore them (from 57mm) to match my 600 pistons.

Any reason why this would not work ?

Cheers

JS

 

No reason at all why it wouldn't, I did exactly that to my 550 Seca

 

Thanks - that's good to hear.

So that would up a regular 550 (528cc) to 556cc approx given the shorter stroke ?

Cheers

JS

 

Yeah thats about what I worked it out it, plenty of stuff on Ebay UK, 600 head has bigger valves and cams and will go straight on as well

 

Thanks. The radian is a 600 so already have the head and stuff.

Out of interest though what did you do for a rev counter since the 600 heads have no drive ?

Cheers

J

 

I need to know this too due to PO swapping the head for a YICS one = no drive
At present I have an electronic tacho from an RD400.... it's not very accurate

 

I didn't use a 600 head on that motor just the pistons

I was going to find an electronic one

 

Yes, that's what I need to do, surely someone must have done this successfully