Madb Posted January 5, 2017 Posted January 5, 2017 Be much better to buy rf900 engine and swap heads and carbs. 1 Quote
badgerkdd Posted January 5, 2017 Author Posted January 5, 2017 Yep, see what you mean about clutch basket .... 1 Quote
badgerkdd Posted January 5, 2017 Author Posted January 5, 2017 Think it might be a better idea, especially as I don't know if the flood water has done damage that can't be seen in a general strip and clean Quote
Madb Posted January 5, 2017 Posted January 5, 2017 There was a write up about doing the swap but think it were on old site. Maybe ask for it in the archive section. Hopefully it's still there. Quote
Madb Posted January 5, 2017 Posted January 5, 2017 With some carefull fettling with carbs and cleaning ports on 750 head the gains are very good for little money . 1 Quote
badgerkdd Posted January 7, 2017 Author Posted January 7, 2017 tell me more @Madb you have got me interested...... 1 Quote
Madb Posted January 8, 2017 Posted January 8, 2017 What would you like to know? Fire away with the questions. I'll do my best to answer them. Quote
Madb Posted January 17, 2017 Posted January 17, 2017 On 05/01/2017 at 11:14 PM, badgerkdd said: Is there any write ups on this conversion in the OSS archives, or is it a 'Google it!' job? Really keen to look into this as long as my engine has survived Redruth's finest flood/ gutter water . Alternatively would it be easier to buy a second hand RF900 engine and stick it in the frame, with 750 carbs? or is that a whole different kettle of ball games? Quite a straight forward swap. Swap complete 750 head, cams,etc onto rf900 (plz use rf900 gaskets.) Use the 750 carbs with bigger jets. If using 750 airbox then mains about 122, needle jet on third ring from top. Pilot jet standard. If using twin socks or twin pods start about 135 mains. Nice set of cams, good flowing end can you should see 145+ bhp. i cant wait to try my track bike out( when built) as it should be near these figures. Of course after one has had shum dyno time. Quote
badgerkdd Posted January 23, 2017 Author Posted January 23, 2017 Cheers @Madb. I spoke to Chris at Grumpy Spares about over boring, porting heads and power gains on the standard 750 engine and it was running into nearly a grands worth of work and parts, out of my range at the moment, so definitely thinking back to the 900 option. I've dismantled the top end of my broken engine, the bottom end bearing has gone on rod 2, with the piston shot too. the head however seems to have survived with little or no damage, I need to get it checked out fully just in case theres a bent valve but its showing no signs of it. If all good then I've got a serviceable head to put on a 900 engine and Bob's your uncle, as they say . Just got to start looking out for decent S/H 900 engines and k4/k5 down pipes Quote
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