Engine differences dtr dtre

[2strokechaz]

Could anyone tell me the differences between the engines of the dtr and dtre apart from the electric start and do the different years of dtr have different engines cheers

[Calum]

Very early DTR models, 88 I believe, ran a slightly bigger bore cylinder, coded 3BN.

Many DTRs ran a restricted 3BN head.

DTREs ran 3MB head & barrels.

The RE engine ran a different crank, stator and fly wheel cover.

Early DTRs had a different oil pump.

[SpookDog]

Some 3bn engines have slightly different inlets, not where the manifold bolts on but inside. The internals have different dimensions that I can only guess is supposed to help flow to the ports...