200 Conversion on a S1 engine..

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a.j
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Fri Jul 11, 2014 4:16 pm

Topic of conversation last night. Is it possible to put an alloy 200 conversion kit onto a Series 1 engine?

RobD
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Fri Jul 11, 2014 6:21 pm

You should look to change the mag flange for a later one, aside from that the only other differences are no oil thrower washer under front sprocket, no exhaust threaded under at rear and the two exhaust hanger side casing studs are the same size as the rest of the studs as opposed to being bigger. Head cowel if the original may not fit as S1 barrel is slightly shorter.

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bikegunn
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Wed Jul 16, 2014 12:19 pm

I'm looking at doing this but keeping the framebreather filter etc..is it worth it? Seen some done but not sure. Any views?


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soullad
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Thu Jul 17, 2014 12:07 am

RobD wrote:You should look to change the mag flange for a later one, aside from that the only other differences are no oil thrower washer under front sprocket, no exhaust threaded under at rear and the two exhaust hanger side casing studs are the same size as the rest of the studs as opposed to being bigger. Head cowel if the original may not fit as S1 barrel is slightly shorter.
wise words. Using an integral sealed driveside bearing or machining the casing back would help with the lack of oil thrower washer.
The M6 exhaust stud holes can safely be taken to M7 and then you could use some M7 to M8 repair studs from Terry White Fasteners.
The barrel / cowling is approx 9mm shorter, and the very early rear runners have a different profile to match the shorter set up, so fitting later S2 /S3 length barrels and cowlings might foul your early rear runners directly under the bridge piece, esp if you use a shorter length shock to overcome any frame clearance issues. (S1/2 shocker approx 312 mm eye to eye, S3 300 mm approx)

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