Honda-SOHC

Let me know how the wheels turn out Tim. May just use the same people if the price and quality is right. Been dreading doing the wheels. What have you done with the hubs, polished/vapour blasted etc. Know what you mean about the powder coaters, my chromers are like that. When they say 2 weeks they really mean 2 months. Cheers Roy.

No I don't think they do. Spent a good hour yesterday searching for HH pads for my 350F without any luck. Would be pleased to hear if anybody has found a source for these. The only HH pads I can find for any SOHC is the Honda 750F2 same as mine. I think were out of luck?

Had a quick check a while ago, and the splitter block looks like the same part number for both 350 and 400, same with the lower steel pipe and the lower hose. Just the upper hose was different due to the 350's higher bars.

Thanks Graeme that could be a big help. Its No.2 (the one with the accelerator pump) that's leaking right now.

Am at the moment waiting for some Genuine Honda float valves to arrive. Took a chance on a bag of 6 genuine used ones from a breakers yard, the guy says they are all in really good nick. With the new Honda ones from DSS being £33 each, I thought £30 for a bag of 6 was worth a go.

Will let you know how I get on after they arrive.

Funny this old classic world, I've got 5 bikes and not a single one on the road that I can use. Weird.

What's the outcome then Ash? Are these expensive new rubbers any good. Sounds like they may be made from the wrong rubber. If they are this NBR type, what's the likely outcome from prolonged use. Cheers Roy.

Hi all. Cant get over the finish line with my 750F2.

Am struggling to get the carbs to stop leaking petrol.

Short history: they were totally stripped and the gummed up bits soaked overnight in carb cleaner, they were then cleaned using guitar strings and compressed air, they were then ultrasonic cleaned and the outers vapour blasted, they were rebuilt with new float valves and gaskets/o-rings. They were bench tested for leaks and a crack with the mallet settled everything (no leaks), fitted them to the bike and gave the engine a run (no leaks), fitted the tank and went for a short ride around the block (no leaks), fixed a couple of non carb related small issues then helmet on for a longer run. Turned on the petrol and a leak from No.2, went for a short run in the hope it would settle (it didn't).

Stripped the carbs yet again and found all the float heights were perfect. So replaced the float valves again with Keyster items from DSS. When tested they leaked from 2 &4 and would not settle. Stripped again and set floats a bit higher to try to shut the valves a bit sooner. Now leaking on 1 2 & 4.

Am I missing something here as I'm starting to get desperate with this. Everything is spotlessly clean, the floats move freely, the float heights are right, the valves are on the third new set. I now have no idea where to go with this as I just don't know what's wrong with them and therefore how to fix it.

Could anybody who has knowledge of these things and lives anywhere near Thornton-Cleveleys Lancs call round and give me some pointers please. Or failing that, does anybody know a carb expert that I could send them to.

HELP!!! Yours sincerely, Desperate of Lancashire.

Well, am 160 miles in now and everything has been going great. Went for a 40 mile run today when it spluttered and started to die. Went onto reserve and all was well again. Filled up to the top at the nearest station, and 2 miles later it was running rough again. Pulled over and looked, petrol was pouring out of one of the overflow tubes. Was fortunately only 5 miles from home so got there by turning the petrol tap on and off. The tank had been initially filled to the top without problems.

These carbs are becoming impossible. Not sure how to go about fixing this as just keeping on re-cleaning them and throwing new parts at it is not working. Am unsure why this would suddenly start again after being spot on for the first 160 miles, clearly associated with slightly raised pressure from a full tank. Think I may need to replace the carbs as the seats for the float valves are not replaceable in the PD's. Tried everything else, a worn float valve seat is now a possibility.

Any idea's guys.

Just looking through the engine bolts for the 350F in case they need re-plating etc. They are actually in good nick, but thought whilst I have time I will see what they would cost to replace. Got the codes for top and bottom bolts and went on the DSS site. Including delivery its £151.32p. Holy crap, for a few BZP shoulder bolts. Every order a lottery win for Dave. The old ones are going back in.

I usually copper slip the threads, is that the correct thing to do.

Thanks all.