First Generation Ascots > Tech Section

Xl 600 jug

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Steve:
Hi all is it possible to fit the xl/ Xr 600 top end to my ft 500, if not is there any big bore kits to increase cc's.
Steve.

J6G1Z:
I don't think they are interchangeable.

There are several big bore kits available from "XR's Only" http://www.xrsonly.com & also check with Mark at "ThumperStuff" http://www.thumperstuff.com

I've heard that the big bore kits will make the engine rev up a bit slower due to the weight of the larger piston. I think many of the folks who race the Ascot stay with as close to the stock bore as possible & raise the compression instead. Now the engine is more responsive & revs quicker. An aftermarket heavy duty connecting rod is usually a smart addition.

Here are a couple of links on modifying the FT Ascot.
http://ascot500.com/index.php?topic=74.0
http://ascot500.com/index.php?topic=5.0

The Honda XL/XR500 & the FT Ascot engines do have some interchange, but only amongst the versions from the same era. I think the 600cc engines have a different cylinder & head design.

Good luck
J.

Steve:
Many thanks for the info and links. We plan to use the motor in an off road sidecar to take on the xs 1000's wish us luck.

J6G1Z:
Why are you selecting the Ascot engine? They only produce about 26 horsepower in original tune.

There may be better engines to use for your project.

Good luck
J.

Steve:
Just happen to have one sat in the garage.

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