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Old 4th September 2020, 08:03   #4
sri_130
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JP4 has a few differences. Can't remember them all.
Inlet manifold won't fit on the plastic J4 one. Will need head tapping (if using jp4 head).
Tensioners are different also and well as the belt cover. Depends on if you run the JP4 head. Cams are different (milder) so wouldn't advise that if racing.
There's a guide on here somewhere.
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