SOHC.co.uk Forums > CB500/550

Advice appreciated

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Fairview:
Thanks for the replies everyone. I'll whip the filter out tomorrow and try it, seems too simple for my luck but you never know. If not I'll try the plug chop and see what that shows. The flooding float chamber sounds like a possibility, it's had new plugs etc. It's still running on the original 4-4 exhaust but they are tired and patched. I need to decide on a suitable replacement as not sure i can stretch to the Dave Silver 600 quid OE replacements (any opinions). That wouldn't be effecting things presumably?

As for the throttle - there seems to be varied opinion on this, the strange thing is I've got a TDM and when compared with the CB it doesn't seem to be much difference, both have double cables too. The TDM has soft rubber grips though. I accept that it might be down to technique and will give what Matthew suggests a go,  but don't think it is just a case of getting used to it, I've had plenty of bikes but never had this problem. The wife rides it too and can't see her enjoying the ride with this set up. That gadget that Totty suggested might do for her.

Thanks again everyone who has replied- I'll update later.

LesterPiglet:
I got myself a chrome Motad replacement exhaust. I didn't find anything else made for it at the time. Nice pipe tho I wish it was a bit shorter.

jcknapp:
First thing I would do is a carb rebuilt kit. Really inexpensive and the carbs probably look like toilet bowls anyways. They I would check the jet size for the main and the pilot. Should be around 100 maybe and maybe 38-40 for the pilots. Run the engine and I got some great advice here for checking the fuel/air mixture. Run the engine hot for 10-15 min. kill the engine, pull the plugs and check the bottom. I would start here. I've realized since I have been riding motorcycles its all about the carbs!!!!! I am dialing mine in right now after adding velocity stacks and rejetting but thats a whole different project.    I used to get cramps on my throttle too. I got used to it by building in up the muscle (haha) or you could get a cruise control bracket for a few dollars when you're on the highway. Also I would do what Lester said and check the filter. There are some improved AM filters for this bike that are much better than the stock ones. Try ebay. Also what matthew said about the hand placement and movement on the throttle is excellent. I gradually roll mine all over in front and back making the muscle not so stressed and more comfortable and enjoyable to ride. Hope some of this info helps!!!

totty:
If your air filter is past it consider replacing the paper element with filter foam from RamAir, it cost £9 for enough foam to do 2 or 3 filters and they can be washed, they sell direct on ebay. It's a very easy job with a knife and a glue gun.

Tomb:

--- Quote from: hairygit on March 15, 2012, 01:11:28 PM --- A kill switch might save the engine from blowing, but you will have no engine braking, the bike will be freewheeling
--- End quote ---

Freewheeling?? why?    ....I'm confused, surely if your engine is in gear with throttle stuck open and the kill switch is turned the bike just slows down like you've shut the throttle.

I know what you mean about throttle slides freezing, if I have had to ride in heavy snow (in the past, too old soft now ;D) I've used my old CB550 with sidecar and had the slides freeze open, had to get home using the kill switch as an on off throttle.

My 500/4 cafe has a Tomaselli quick twist which only has one cable which has been Ok.

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