Goo'Roo Posted February 20, 2017 Share Posted February 20, 2017 Hello to everyone, quick question. I have several oil cooled parts but not complete engines apart a very fresh gsf600 and I'm building a Bandit 6/something as a city/beer commuter Do you know if the 750dot cylinder block fit the gsf600 case? Or shall I find a gsx750 non dot block and rebore to fit the 73mm dot pistons? What about the head? Dot or standard gsx750f? Quote Link to comment
dupersunc Posted February 20, 2017 Share Posted February 20, 2017 The block and head are fine, but gudgeon pins are different sizes so the 750k pistons don't fit the 600 rods. Quote Link to comment
Goo'Roo Posted February 20, 2017 Author Share Posted February 20, 2017 Does the 750k have 20mm pin diameter? Quote Link to comment
Oilyspanner Posted February 20, 2017 Share Posted February 20, 2017 Yep, the short strokers have a 20mm small end/pin diameter. The B also has a 4mm longer stroke, so a spacer would need to be used to lift the block. The 600 motor is based on the long stroke 750s with 70mm bore, the 73mm bore and wider liners of the short stroke may mean the cases need to be opened up to fit them in - not done this so someone might confirm this. Quote Link to comment
richyrich Posted February 21, 2017 Share Posted February 21, 2017 I found the frankenstein monster article on the old home page very helpful to think thru compatability between model. Is it in 'the archive' here? Its somewhere Quote Link to comment
richyrich Posted February 21, 2017 Share Posted February 21, 2017 theres an article on page 2 of "the vault" titled frankenstein...... below is a quote from it 2. A 750R-90 or 750R-91 top end on a B6. It’s actually very easy, and I think all the info you need is above. Both engines have the same stroke, same wrist pin diameter. Theoretically, it would be possible to put only 750 cylinders and pistons on a B6. However, the pistons are designed to fit the 750 head and since that also fits, why not install a 750 head as well (with bigger valves). Since the B6 has another cam chain the B6 cam chain tensioner, cam sprockets, cam chain guides and B6 valve cover need to be used. Then there are 2 options: either go for a 750R-90 top end, which uses forked rockers like the B6 does (so it’s possible to use either the B6 cams or the 750R cams), or go for a 750R-91 top end, which uses another type of rockers so it is not possible to keep the B6 camshafts. Quote Link to comment
dupersunc Posted February 21, 2017 Share Posted February 21, 2017 1 hour ago, richyrich said: theres an article on page 2 of "the vault" titled frankenstein...... below is a quote from it 2. A 750R-90 or 750R-91 top end on a B6. It’s actually very easy, and I think all the info you need is above. Both engines have the same stroke, same wrist pin diameter. Theoretically, it would be possible to put only 750 cylinders and pistons on a B6. However, the pistons are designed to fit the 750 head and since that also fits, why not install a 750 head as well (with bigger valves). Since the B6 has another cam chain the B6 cam chain tensioner, cam sprockets, cam chain guides and B6 valve cover need to be used. Then there are 2 options: either go for a 750R-90 top end, which uses forked rockers like the B6 does (so it’s possible to use either the B6 cams or the 750R cams), or go for a 750R-91 top end, which uses another type of rockers so it is not possible to keep the B6 camshafts. That applies to the long stroke 750 motor, not the short stroke dot motor. Quote Link to comment
richyrich Posted February 21, 2017 Share Posted February 21, 2017 true ,must pay more attention, theres more there, worth a read Quote Link to comment
Goo'Roo Posted February 22, 2017 Author Share Posted February 22, 2017 I've just bought a gsx1100f engine.. Thread closed 3 Quote Link to comment
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