Show Posts

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.


Topics - H2Eric

Pages: [1] 2
1
Out & About / Donington Park 31st July - 1st August
« on: July 27, 2021, 10:23:54 AM »
Anyone going to Donington this weekend for the CRMC meeting? If so, do come and say hello, I'll be on the Melbourne loop with my CR750 and in the GP legends parade.
Eric

2
CB750 / Carburettor Inlet Rubbers
« on: July 08, 2021, 12:34:05 PM »
Does anyone have the dimensions of the Honda CB750 carb inlet rubbers (the diameter of the hole at each end)? Particularly those fitted to the CB750 F2. I'm looking for a set of rubbers for a set of Keihin race carbs with ticklers (CR31) to attach to a K0-K6 cylinder head. The spigot on the carbs measures 40mm and surprise, surprise the rubbers for the K0-K6 models don't fit.
Thanks
Eric

3
CB750 / Vapour blasting
« on: October 07, 2020, 04:46:25 PM »
Looking to have a CB750 cylinder head vapour blasted recently I was pointed in the direction of Mark (07795 102487) at East Lincs Vapour Blasting in Alford. Thanks to Julie for the tip.
Here's the result, an excellent job at a very reasonable price (£40).

Eric

4
CB350/400 / Carburettor woes
« on: August 29, 2019, 11:16:31 AM »
I would have my CB350f on the road, but its got carb problems. It wouldn't run properly, usually Cylinder No.3 wouldn't fire at all. Then No.2 gave up the ghost. This was traced to the main jets and the 'O' rings, which of course were 45+ years old and petrol was leaking passed the 'O' rings. A new set of jets and hurrah we have all 4 cylinders working. The next snag was that I couldn't get the bike to idle properly. It would idle nicely on start up, perhaps with a tweak on the throttle stop screw, but out on the road at every stop the revolutions per minute would be around the 3000 mark. Leaky float needles perhaps. There was a dribble or two from some of overflow tubes when the tap was turned on, but stopped as soon as the engine started. So, another strip down and new float needle assemblies fitted.  A bench test before putting the carbs back on the bike and hey presto, petrol pours out of every possible outlet when you turn the tap on. Oh pooh! or something along those lines. Float needle problems I guess and detritus lurking somewhere despite having the carbs ultrasonically cleaned.
The seats for the float needles (new after market jobs) don't look to clever with the aid of a magnifying glass, but I wouldn't have expected petrol to gush from the overflow tubes, a dribble may be. A new set of Genuine Honda float needle assemblies have been ordered for CMSNL at great expense. Meanwhile, has anyone had similar problems? I'm sure this is not restricted to just the CB350f. Anyone know of a good carb rebuild person(s)?

Eric

5
CB350/400 / Float Height CB350f
« on: July 20, 2019, 11:51:01 AM »
The Honda 'Shop Manual' for the CB350f is a little vague on setting the float height.
Apparently the float height should be set at 21mm, but measured from where to where? The manual also mentions the use of a float level gauge, a special Honda tool perchance, but what do you do if you haven't got one?
Any advice gratefully received.

Eric

6
Out & About / Festival of 1000 Bikes, Mallory Park, Sunday 14th July
« on: July 12, 2019, 09:20:44 AM »
Anyone going besides me?
Keep an eye out for the CR750 in the race paddock and come and say hello.

Eric

7
CB350/400 / CB350f exhausts
« on: June 06, 2019, 05:51:46 PM »
If anyone has a set of 4 into 4 exhausts on their CB350f can you please tell me if the side stand spring touches the No.1 exhaust pipe when the stand is retracted. Mine does, but I'm sure its not supposed to do that.

Eric

8
CB350/400 / Numbers for HT Leads
« on: February 23, 2019, 10:03:40 AM »
Does anyone know of a source for these? White numbers on a black background. Presumably Mr Honda used the same style of font for all models.

9
Misc / Open / Help Please - Part Identification
« on: October 11, 2018, 12:20:37 PM »
Anyone know what bike these grab rails came from?
They were allegedly from a 1980 Honda CB750KZ but I can't find any info to confirm.

10
CB750 / A question for the sand cast gurus
« on: October 06, 2018, 11:48:22 AM »
According to John Wyatt's book 'Original Honda CB750' the first 7414 engines were made by the gravity die cast process or sand cast if you prefer and then the pressure die cast process was used. The question is, at what date did the change take place?

11
CB750 / CB750 Oil Pump
« on: March 24, 2018, 06:01:19 PM »
On peering into the oil tank on my CB750 to check the oil level I spied absolutely nothing. There was plenty of oil in there when I parked it p for the winter, but its all in the sump now having obviously leaked passed the oil pump. I'm assuming it shouldn't do that and the pump either needs a complete rebuild or at the very least a replacement oil leak seal (Part No. 15166 300 000), which is sadly no longer available. Where do I go from here?

Eric

12
CB350/400 / Another restoration ready for the road
« on: February 02, 2018, 02:35:49 PM »
Hi folks
Here is my latest restoration, a 1972 CB350f imported from the USA. It's been a fairly straight forward job. Take it all to bits, powder coat and re-chrome as necessary and replace various parts with new ones from David Silver / CMSL adding to their already bulging bank accounts, but what would we do without them. A big thanks to both. Phil Denton also provided some lovely stainless components - Cylinder studs, axles and swinging arm pivot to name but a few. More of him in a moment.
The snags, well there had to be a few. On getting the bike I noticed a bent fin on the right side of the cylinder head, nothing that a gentle tap with a piece of wood and hammer wouldn't cure, but then I noticed some damage around the number 3 spark plug. A strange place to get broken fins and also the top of the cylinder stud in that area had taken a beating. Once the cylinder head was off it was easy to see why. It had obviously suffered a seized / broken spark plug at some stage and some clown had tried to drill it out going off center in the process. Part of the old spark plug was still there! Cost of repair, well north of 100 of your best pounds. Plenty of second hand cylinder heads on ebay, all in the USA of course and cheaper than repairing the damaged one except that the cost of shipping was stratospheric. Fortunately DK Spares came to my rescue with a spiffing example, 80 quid all in, result. On removing the original cylinder head I also noticed that the oil feed pipes that distribute the lubricant to the camshaft and rockers were missing. Probably omitted by the same miscreant that damaged the head in the first place. Ebay to the rescue.
The one thing that did cause a problem and delay to the restoration were the fork covers that sit on top of the bottom fork cases. They were a devil to remove, but thanks to those on here that came up with the solution and I got them off without damage. The snag of course is that these components are no longer available and are so thin that a re-chrome would probably finish them off completely. The odd second hand one appeared on ebay in a far worse state that the ones I'd got. Enter Phil Denton into the equation and a commission to make a pair out of stainless. Very nice chap Mr Denton and he likes a challenge. Slight drawback in that he is a very busy man so the components did take some time to appear from his emporium, but well worth the wait and they wont rust. Hurrah!
So there you are, it's all tickety-boo, tip top and ready for the road whenever the weather decides to improve. Hmm, could be a while.
A special thanks to;
Terry Chambers (Racepaint UK) for the paint job
Triple S for powder coating.
My good friend John Edge for the chrome work
Phil Denton (see above)
Steve Lomas (5-one Wheels) wheel building and tyres
David Silver, CMSL and J. T. Marks (USA) for various new parts and DK Spares for the second hand ones
plus my trusted friend Graham Wood for all the help with the spanner work.

Hope you like the end result
Cheers
Eric

13
CB750 / CB750 Forks
« on: July 18, 2017, 01:31:22 PM »
I have several sets of front forks, those from the K6/K7 models measure 77cm from the center of the axle to the top of the fork tube when fully extended so spring length/compression is not a factor. A set from a K1 also measure up exactly the same, however, another set of the early type forks I have allegedly from a K0/K1 are 4cm shorter. Have these shorter forks come off something else, like a CB450 perhaps as the fork cases are the same as the early CB750 or did Mr Honda in his infinite wisdom make a change somewhere in the production run?

Eric

14
CB350/400 / 1972 CB350F - Oil Filter Collar
« on: January 25, 2017, 01:58:21 PM »
Does anybody happen to have an oil filter collar, Part No. 15423-333-000 that they can measure the length and diameter for me?
These parts are still available, but at some cost, £30.48 plus the dreaded VAT, which does seem rather a lot for what appears to be a thick walled piece of tube, so I plan to knock one up on the lathe.

Thanks
Eric

15
CB350/400 / CB350f Prinary Chain Guide
« on: December 28, 2016, 01:27:45 PM »
Does anyone know which way round the two primary chain guides fit in the crankcases on a 1972 CB350f. The photo attached is the lower crankcase with the front of the engine at the bottom of the picture. There is a small hole at one end of the guide, which I assume is to signify which way round it fits, but I can find no reference to it anywhere. With a 50% chance of getting it right the question is have I and which way round does the guide fit in the upper case?

Thanks
Eric

Pages: [1] 2
SimplePortal 2.3.5 © 2008-2012, SimplePortal