Quote:
Originally Posted by Darren69
1997 was the year the Monster had the small valve (750 head) fitted and different cams, smaller carbs etc. Down to a paltry 68 bhp unless you had the S version which still had the 900SS lump and presumably the other original SS bits.
They did eventually change it back again around when the 900 S model was discontinued. Around '00 to '01 But the whole S saga is another story and I'm sure Gazza will fill in the hazy details around that or I will need to look it up. Essentially there were some S models with old spec and some with the new spec when the Mk1b model came out.
I suppose they were using up whatever stock they had available?
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But this bike started out as an M600, so the engine may be modded. All we know at the moment is that it’s got the better heads.
Depending when it was made, some 900 motors have been opened up to change the cylinder head studs: an early spec. tended to snap.