Late NSR rear engine bolt removal ????

[mecanic]

Hi All
I’ve got a late model NSR R that I’ve got to drop the engine out of.
I’ve stripped everything down and loosened all the engine bolts…However, the rear engine bolt has a very large diameter head on it with an alan screw type centre, the head has a separate large diameter thread on it as well which screws into the steel frame. The Head makes the bolt too large to withdraw through the access hole in the Alcast frame.
Question, how the hell do I withdraw the bolt far enough to get the rear of the engine loose.

By the way, I’ve tried “double nutting” the other end of the bolt and unscrewing it from this oversized head, but it’s pretty gunjed up and I can’t get enough access/leverager to get this to work so far…

HELP..

Thanks

Mecanic

[mecanic]

Problem Solved.

Just in case anyone else gets stuck…

The Large head is actually a cap and if you leave the nut in place the other side of the bolt and use a bug enough alan key, the cap will unscrew revealing the full large diameter thread I mentioned (this must be for aligning the back end of the engine). One you’ve got the cap off, there’s a smaller alan socket to undo the head which WILL now fit through the access hole so you can withdraw the bolt fully.

Should feel like a numpty,but, no amount of searching or the Manual I’ve got on CD would reveal this.

Mecanic

P.S. Engine’s out and the Knackered piston and bore revealed Boooo Hooo[]

[BigBen]

ahh was just about to say, thats pretty much the same deal as the aprilia RS125. they are my toy of choice at the moment (awful that they are though)
im on with a barrel/piston replacement. bloody two strokes!

[Radar]

Sorry to hear that the NSR is giving you trouble. Seems like you are cracking on with getting it sorted…let us know how things progress

[mecanic]

Just got the call, engine’s fixed and ready for collection, which I’ll do Thursday evening.

@benji_zx10r

I assume you’ve got someone sorting yours, if not (when I know mine’s any good, and if your in the West Mids) I’ll put you onto the guy I used.

Cheers

Mecanic

[Author]

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