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Project Board / Re: CB350f (400) - big bore time
« Last post by paul G on Today at 04:55:44 PM »
Get yourself some velcro with adhesive on both sides stick it to the valve  and sucker or that rubber sucker will drive you mad  :o :o :o
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Project Board / Re: CB350f (400) - big bore time
« Last post by Moorey on Today at 04:52:16 PM »
I always do valves with a drill if i can get one on. It takes a fraction of the time. Valve grinding suckers must be one of the most frustrating tools in the box.
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Project Board / Re: CB350f (400) - big bore time
« Last post by Erwin83 on Today at 04:40:29 PM »
I certainly don't. Completely resurfacing the valves and seats would be a machinist job for sure.

Just to be more sure and don't run the risk of screwing up my one bigbore head gasket, I just ordered a can of Chemico valve cutting paste and one of those suction-thingies-on-a-wooden-stick. Hope the smallest one will fit the exhaust valves.

The valve lapping should be a bit better with that, and I'll be doing a leak-test with the valves in place to check results afterwards.


Thanks for the advice once again.
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Project Board / Re: CB350f (400) - big bore time
« Last post by Nurse Julie on Today at 04:11:36 PM »
Yes, fit the springs and you may not have a leak. If the bike was running fine before you took it apart, just lapping in will  be OK I'm sure. I'm also assuming you don't have the correct equipment to grind the valve seats and re face the valves anyway. 
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CB500/550 / Re: CB550F Main Jets
« Last post by Nurse Julie on Today at 04:04:59 PM »
Delkevic advise standard jetting for their exhaust systems. I have an original Yoshimura 4 into 1 on my CB550/4 F mongrel, with standard airbox and filter and a minute push in baffle but with no silencer and I still have the standard jetting fitted to the carbs. It's usually a case of changing jets if you remove the standard air box and fit pods or velocity stacks instead.
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CB500/550 / Re: CB550F Main Jets
« Last post by cooleronthecoast on Today at 03:42:48 PM »
Hi

I got my new jets etc from nrp-carbs.co.uk, they may have what you are looking for.

Dave

Thanks Dave

I had a look at their site and they quote a 108 Jet for the 550F and a 110 for the 550K so I'm a bit confused now.   I've left the 3 100's I have in 3 of the carbs and I found a 98 for the 4th one, but I would like to get the correct ones. 

 I have the Delcavic exhaust fitted which I'm guessing is more free flowing than the original system, so perhaps the main jets in size 100 might be a better bet?  I'd be grateful for members advice on that one.
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Project Board / Re: CB350f (400) - big bore time
« Last post by Erwin83 on Today at 03:01:38 PM »
OK, so you would advice cutting/lapping the valve anyways (now that we're here)?
Obviously, I was only cleaning so far. The engine ran well, and there were no signs of leaking or burned valves. (the old 'if it aint broken, don't fix it' idea)

I guess that you're also saying that installing the springs and applying pressure to the seal, the results of the leak-down tests may differ.
I don't see the difference (technically) between adding the fuel in the ports, against in the combustion room. Apart from the the latter is less messy...
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CB500/550 / Re: CB550F Main Jets
« Last post by Nurse Julie on Today at 02:56:03 PM »
I always use the Cruzinimage carb kits, well, the brass bits anyway, I just ditch the O rings that come in the kits and upgrade them to Viton.
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CB500/550 / Re: CB550F Main Jets
« Last post by Johnwebley on Today at 02:55:13 PM »
If you need a rebuild kit.check
Www.cruzinimage.net
Great carb  kit. Quick delivery and good prices
But isn't that the infamous Keyster set?
Don't think so.

I have had a couple of sets. For different bikes.
Always been good.
I know several on here that use them

Sent from my SM-A750FN using Tapatalk

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CB500/550 / Re: CB550F Main Jets
« Last post by deltarider on Today at 02:51:33 PM »
If you need a rebuild kit.check
Www.cruzinimage.net
Great carb  kit. Quick delivery and good prices
But isn't that the infamous Keyster set?
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