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 - royhall
Pages: 1 2 3 [4] 5 6 ... 218
46
« on: February 18, 2024, 02:08:19 PM »
Just been studying the schematic of the diaphragm housing and my plan to remove and blank the ports wont work. Without the housing the slow running circuit will not flow air. It appears that the housing will have to go back on with the diaphragm in place to hold the spring plate open, but blocking the vacuum tube will keep the system locked in that position. Either that or a much more powerful spring to prevent the diaphragm moving. This is all too complex to be worthwhile so I am on the lookout for a good pair of CB450 carbs. Shouldn't have tried this in the first place really, I would rather the bike was ready for spring than be in the garage with some experimental nonsense going on. Plus running as rich as it has been will eventually trash the engine.
Ash. Putting that aluminium disk in wont work either as the plate valve behind will stay in the over-run position and be horribly over rich all the time. You just need to blank the small port above that disk with a piece of rubber the same diameter as the o-ring, then reassemble the valve as stock with the diaphragm in place. That's job done.
47
« on: February 16, 2024, 07:32:09 AM »
Thanks Ash. According to that article the removal of the air cut off valves shouldn't make any difference to the rich mixture problem the bikes suffering as it only occurs over 4000 rpm. At least I was understanding it's operation correctly. The removal of the diaphragm housings are done now and I am about to check the float heights are correct then I can reassemble the bike and test what has changed. If nothing has changed, I may end up looking for some decent 450 carbs after all.
Sent from my Pixel 7 Pro using Tapatalk
48
« on: February 14, 2024, 06:11:05 PM »
That's fair enough, if your pistons are all the same size then the bores will be as well. But it would be a poor job not to check and just trust them. I've had two sets of aftermarket pistons that have been slightly different, they were machined to suit. Never had a difference on genuine though.
Sent from my Pixel 7 Pro using Tapatalk
49
« on: February 14, 2024, 05:03:07 PM »
0.0025" is way too much for a Honda. At that it would burn oil for fun. Maximum on those is 0.001" and sometimes less than that. Plus they may not all be the same. Pistons should be allocated to a bore then measured for each bore. Fairly likely that the pistons are not all the same size. If you should get a slightly undersize piston on a 0.0025" bore you will hear the slap. As for the barrel effect, from my time as a machinist that is usually too high a feed rate. Rushing.
Sent from my Pixel 7 Pro using Tapatalk
50
« on: February 14, 2024, 02:52:09 PM »
Hi Mo.
Yes they are a 500T carb experiment that so far is not going too well. Hopefully removing the air cut off valves will cure the problem. Just re-looking at the advice that Ash sought on Facebook, and I'm not sure I agree with what was said. They mentioned that the cut off valves introduce extra air on the over-run to stop exhaust popping, that's not my understanding. I'm fairly sure they introduce extra petrol to enrich the mixture past the point of ignition so it cant burn in the exhaust header. Hence my running rich problem, and why I'm removing them. Will find out once the jobs done and the weather allows a run out.
On the other point about the tank. Bombers don't have a cross pipe to level the fuel, they just use the braking and accelerating of the bike to slosh the fuel to the other side. Typical 60's Honda.
51
« on: February 13, 2024, 04:22:57 PM »
Finally got around to the Bomber carb job. Started by stripping the diaphragm housing off the side of the left hand carb as that one can be done with the carb in place. As the carb man said he had deactivated the unit I was a bit surprised at what was in there. It was a fully functioning valve complete with brand new diaphragm.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
The silver centre part of the casting is actually some sort of valve that the diaphragm rod presses against. After a bit of cogitation I decided to leave the diaphragm housing alone. So instead of trying to randomly block off holes and make a mess, I decided to make an aluminium plate to cover the three ports and just leave the casting off. This has the added benefit of being easily reversed should needs arise. It also makes the carb look a bit more like a 450 item.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
That's the easy side done, the right hand side needs the carb removing to get at it as the diaphragm housing is on the inside between the carbs. That's a job for another day.
52
« on: February 09, 2024, 05:19:45 PM »
Any takers before it goes on eBay.
Sent from my Pixel 7 Pro using Tapatalk
53
« on: February 02, 2024, 04:07:37 PM »
Just a few more pictures.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
54
« on: February 02, 2024, 04:02:45 PM »
I'm hoping to sell a Triumph Street Triple 765RS. It is/was owned by my long time pal Jim that I have been going to the Isle of Man with for the last 30 years. Unfortunately Jim lost his battle with cancer in December last year. He had bought the bike last summer as a self reward for getting through all the cancer surgery and chemo. Before he died he asked me to sell his vehicles to help out his widow. I have so far got rid of the car and his Kawasaki ZXR750 with just the Triumph to go. Thought I would offer it to you guys first, you never know.
The bike is a 2018 Triumph Street Triple 765RS. It is in very good condition having covered a mere 5800 miles since new. Starts straight away on the button and does everything expected of it, including the compulsory clutch rattle (they all do that sir). It has Pirelli Rosso Diablo 2 tyres on it with plenty of tread depth left. This is the one with the twin radial Brembo brakes that without the ABS would throw you over the handlebars. Looking for serious offers around the £6000 mark which is an already excellent price for this fully loaded RS model in great condition. The bike is in Lytham StAnnes, Lancashire. PM me if your interested or want any more information. The bike will shortly be advertised elsewhere.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
55
« on: January 31, 2024, 04:18:43 PM »
I knew it would end up a nightmare for them. Can you see why I avoid doing them, had a few late finishes over the years. Hopefully you will be good for a few years now.
56
« on: January 31, 2024, 08:07:39 AM »
Big expense as well to change that for a standard wall mounted, plus you then need a new fire and surround.
Sent from my Pixel 7 Pro using Tapatalk
57
« on: January 31, 2024, 07:07:24 AM »
Had a phone call this evening he has the parts - Baxi Engineer will be starting at 8.00 am - he tells me the manual time is four and a half hours to fit the new condensate tank.
That's about the right time Ted, it's a real bitch of a job to do. I hate those modern back boilers, always try to be too busy when one of those pops up. Fortunately Baxi didn't sell many so they don't come up often. One more year to go and I can wave them goodbye for ever. Sent from my Pixel 7 Pro using Tapatalk
58
« on: January 26, 2024, 05:31:03 PM »
Runaway train budgets, now there's a subject I'm an expert at in all the wrong ways.
Sent from my Pixel 7 Pro using Tapatalk
59
« on: January 26, 2024, 08:47:12 AM »
Didn't I just say that Ken. Or were you meaning a new chromed rim.
Sent from my Pixel 7 Pro using Tapatalk
60
« on: January 26, 2024, 08:27:34 AM »
Don't powder coat over the chrome blasted or not, it will come off in no time. Spokes and rims come under quite a stress that causes flexing. May be better to try a process like Ceracoat which is a ceramic coating. It flexes better than powder.
Sent from my Pixel 7 Pro using Tapatalk
Pages: 1 2 3 [4] 5 6 ... 218
|
Show Posts