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Messages - Phil
16
« on: March 04, 2008, 09:24:51 AM »
Thanks again Sam. I will be there if at all possible. Q96 - do you use 31mm or 29mm Keihin CRs? I am told to use 29s as my first engine will use standard con rods and therefore won't be able to rev high enough to enable the 31s to work. This is a "parade" engine - I am planning a Wiseco 836cc kit, Dynoman/ Megacycle cam, stronger valve springs and some mild headwork and the CRs. I am tempted to try a standard'ish F2 head? I have plans for engine 2 which I want to keep 750 with a light crank, Carrillos, Nova box etc. Q95 ...
Cheers
Phil
17
« on: March 03, 2008, 10:12:51 PM »
Wow! That is a lovely bike! The thread is interesting. The original CRs are very rare birds indeed. The only one I have seen in the flesh is in the old Honda museum at Suzuka. Sadly they would not let you take pictures (they do now). Is that the standard rear hub on your bike or one of those expensive magnesium jobs? What are the footrests - Disco Volante? Did you beef-up the cam holders? I have 101 questions ...
cheers,
Phil
18
« on: March 03, 2008, 09:41:04 PM »
Sorry about your father-in-law. The site is great - I like the Nirvana Mcs site as well - I love the billet stuff for CB750 (and have asked the prices!). I see you are a CB500-4 man? I had a new one in 1973 - great bike when it came out.
Cheers
Phil
19
« on: March 03, 2008, 09:17:39 PM »
Thanks Rob - that certainly makes sense. M3 say that their "special bush" eliminates the "high speed death wobble" that CB750 are famous for! They can't supply and I wondered if the roller bearing might be a substitute. I have experienced the famous wobble (and survived to tell the tale!) and want to try to prevent it on this CR replica (I am too old to experience it again)! I have two frames - neither of which has any play that I can feel when the bile is stationary but since they are being blasted, welded-up, strengthened and painted, I thought I would do what I could. Thanks again!
Cheers
Phil
20
« on: March 03, 2008, 10:53:31 AM »
Hi - has anyone experience of using roller bearings in place of swinging arm bushes? Would they be of benefit to a race bike? Any advice welcome!
21
« on: February 28, 2008, 12:11:28 PM »
Hi and thanks for the response. I have obtained parts books for F2 and K7 (thanks to this great site!) and you are correct: the valves on the K7 are the same as K6 and different to F2. I also note that there are slight differences in the gearbox. The K7 and the F2 are identical, according to part numbers, but different to the K6. Is this the 'closer ratio gearbox'? I want to run a standard gearbox on this engine so this is a bonus - or am I missing something?
Phil
22
« on: February 27, 2008, 09:21:26 PM »
Hi - I am putting together a CR 750 Replica and would welcome advice, photos etc of the genuine article. I have two engines - a K7 and a K6. I believe a K7 is an unpainted F2 and will have bigger valves and combustion chamber (?). Similarly it has a closer ratio gearbox. I intend to use a special 836cc Dynoman piston kit, race cam (Megacycle or Dynoman), s/steel valves with titanium retainers, stronger springs and Keihin CR 31mm carbs. I want to use standard rods. I need someone to port the head and fix the new valves and guides - anyone know anybody? The K6 engine will be tuned to rev higher and will use a Nova c/r gearbox and Carillo rods, etc. Any help/advice most welcome!! Phil (philipclark2@mac.com).
23
« on: February 27, 2008, 09:12:21 PM »
Hi - I am in Woodbridge, Suffolk. I am seeking advice on K7/ F2 engines with a view to tune them. Any advice welcome. - philipclark2@mac.com
24
« on: February 27, 2008, 05:39:24 PM »
Hi all - I am building a CR750 replica and wonder if you guys can help? I have a K7 engine and the official Honda workshop manual says that it is identical to the F2 engine, except it is not black! Is this correct? I know I could remove the head and measure the valves but have not got around to it yet. I will be tuning the engine using an 836cc kit, Megacycle cam or Web cam, Kehin CR 31mm carbs etc and any advice would be welcomed. Thanks - Phil
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