This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Messages - Phil
1
« on: October 22, 2008, 02:01:23 PM »
Hi - sorry have been abroad working - now home. Yes, everything available. Phil
2
« on: May 30, 2008, 03:25:31 PM »
I have an (imported from USA) CB750 F2 for sale. Believed good engine (not dismantled) and everything else needed to build a decent one. Also have some K7 stiff - ask. Need the space! Prefer to sell F2 complete (
3
« on: April 07, 2008, 04:25:09 PM »
Thank everyone - I will certainly speak to CAT about some iron discs! Phil
4
« on: March 27, 2008, 05:47:19 PM »
Thanks!
5
« on: March 22, 2008, 12:11:45 PM »
This is of interest to me! I have been advised to use a 2.75 (or preferably 3 ) inch wide rim on the rear wheel in order to be able to use the best racing tire section. I am concerned that if I fit this wide rim and tire, the chain will foul the edge of the tire. The engine is based on a K7, the frame a K4. I have swinging arms from the K7 and the K4. I have rear hubs from the K7 and K4. Would using the K7 swinging arm and the K7 rear hub provide more clearance for the chain? Thanks guys!! Phil
6
« on: March 17, 2008, 07:34:09 PM »
Beware!! Not all swinging arms are interchangeable. The K7 hub/ swing arm is wider and longer than the K6. I think this was to accommodate that wider 17 inch tyre on the K7. Phil
7
« on: March 17, 2008, 07:30:36 PM »
I want to reduce the (huge!) weight of these discs. Given your helpful advice, should I (a) skim them to 4.5mm or b) drill them? Thanks to all. Phil
8
« on: March 17, 2008, 06:36:51 PM »
Hi -I need a set of F2 valves. I have tried the usual supplier (David Silver!) but no luck. Anybody have any ideas? Phil
9
« on: March 17, 2008, 05:57:51 PM »
By the way ... I agree with you 100% on tuning these engines - it's just a bit of fun and it's just as well to fit a Wiseco 836cc kit as trying to get OEM pistons - same story with valves etc. I have a CB900 Hornet which is way quicker. Today I took two heads (from an F2 and a K6) to a racing car engine preparation place and the guy there was intrigued when I said the F2 heads were not used because of the valve angles. he said it was a much better design but on both engines the exhaust valves were far too big and this would cost BHP. The correct size for the exhaust valve is 26mm. He is flow testing them for me and will report the BHP potential soon. The plan is to have a mildly tuned engine in a close CR replica and a proper racing engine in the other bike. This guy incidentally, did the work on the Moto Guzzi MGSO1 for the factory and was grinding some racing camshafts for Maserati when I called by! Pretty cool place and only a couple of miles away. Phil
10
« on: March 17, 2008, 05:38:18 PM »
Your stronger engine mountings look much better than the originals - this is a real area of weakness! I wanted some made in 7mm titanium (I have the plate) but am struggling to find a machine shop that can do the job - same story trying to get Ti engine bolts, wheel spindles, swinging arm spindles etc. Nobody wants to work with the stuff! I am interested in your swinging arm bushes - what is the price? Also, your spin-on oil filter is pretty neat - did you make the holder? Do you make a blanking plug for the kick-shaft spindle? Phil
11
« on: March 08, 2008, 09:29:00 AM »
That brings back memories! Regret no pictures - all I have is a front sprocket! I like your Japauto and some of your ideas are great. Strengthening the frame around the engine mountings is a good idea. In the early days we used to think the flexing was the swinging arm - hence people fitting Dresda box section ones. Now they know the original swinging arm is fine in terms of flex. The factory heavily braced the top two tubes between the shock top mountings. The metal quality of these frames was/is terrible. I have a K7 frame which I have cut up and the wall diameter is paper thin in places and not through rust. It is also rusted right through in other places because condensation forms inside these tubes and they rust from the inside. The welding around the headstock is also terrible. Tubes are rammed into other tubes and held in place with a couple of spot-welds! Some of the serious CB750 racers had new frames made to the exact dimensions of the originals - but made of top quality tubing. The frame design/ dimensions are fine, it's just the crap materials I think! I would love to see more pictures.
Phil
12
« on: March 08, 2008, 09:08:10 AM »
Q92 and Q93 (don't want to overload Sam!) - I am hoping to race/ parade this replica in CRMC events and the rules are strict and confusing! I need to get alloy rims put on the standard hubs. Anyone know A) the max rim size that is allowed (and that the swinging arm can accommodate); B) the best tyre size/ make? I am also using the standard stainless discs because I can't find steel replacements (anyone know a supplier?). The s/s discs weigh a ton and say on them that the minimum thickness is a wopping 6mm! My s/s NSR discs say maximum thickness is 3.5mm. Does anyone have experience of machining discs? Does anyone know where I can get the discs drilled? Thanks!
Phil
13
« on: March 05, 2008, 10:57:34 AM »
Thanks again. I have to keep the standard swinging arm in order to comply with the CRMC rules. I think I will go for high quality bushes and keep the pivot bolt standard except replicate in titanium. Love the Japauto! I raced a 960cc Japauto in a six hour endurance race in Belgium back in the early 1970s - quite a beast then!
14
« on: March 04, 2008, 10:05:24 AM »
Woodbridge Sprint? Thundersprint? Northwich? Am I missing something? Where will you be on May 10/11th Sam?
Phil
15
« on: March 04, 2008, 09:59:45 AM »
Thanks - all this information is very helpful. I was puzzled by the M3/ Adam Pop claims. It is scary at speed though! I am having a titanium swinging arm pivot machined, would increasing the i/d of a high grade bush help? Why is the bush not longer? Why not drill the centre of the pivot and put grease nipples on the ends? Can you custom produce? Sorry for all these questions...
Phil
|
Show Posts