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Well made some good progress! I should have never trusted the guy how sold me a rebuilt engine!!! Stupid me thought that if he'd rebuilt it he knew what he was doing. When I checked the valves all but one had no clearance, ZERO! No wonder it was difficult to start. Anyway now starts and idles...

Thanks. I think I've been superficial with the engine as I bought as a rebuilt unit with just the stater gears to sort out. I'm kicking myself for not checking everything before assembly.

I've not been able to sync it at idle because, as I mentioned, I've not been able to get it to idle. I'm going to check the valves next and I like the constant tube method, thanks.

I popped my vacuum tester sync tool made out of two beer bottles on tonight and just tuned it over to find the left carb has a lot more vacuum than the right even with both butterflies totally at the minimum rest point/totally closed. That's what started to make me that perhaps I have for...

Ok thanks I'll try it

I was just following other advice and one guy who has the same setup as me who is running stock 41 pilot jets, and stock mains with a decent result (he can ride it but gets popping when the throttles' open (too smaller main?) So I left my 125 mains as it just seemed logical and it seems to run...

I've tried some larger pilot jets but it kept flooding, I'm getting better results with the stock size. I've got slightly bigger main jets and others even bigger ready if needed. The strange thing is that it's so difficult to start, but yesterday when it did and I was using the thottle it...

I didn't mean to offend. I just meant I have a nice new battery waiting, my temp has run low so I jumped it. My primary problem is getting it to start and keeping it running. I'm not really tuning the carbs as much as trying to get it to run. So thank you for any advice, as the problem does not...

I'm using a temporary battery as I have a Antigravity which I don't wish to use until it's running ok. Thanks anyway.

Hi. Simple question, I hope: I noticed that there is a difference in the stock jets and needles between the UK and USA hitachi carbs. Can anyone explain why and what difference it makes if I'm using an American spec in the UK?

Been messing with the bike all morning. It starts, but hell is it difficult to get it to start. No enricher needed at all. If I wasn't using jump cables off my car battery it would be impossible. When it did start I had so much difficulty getting it to idle. But when I rev it it sounds sweet. I...

Thanks. I had a 45 pilot in and it was virtually impossible to start when it did it wouldn't run well at all and gave all the signs of flooding. Now with the stock pilot jets at least it starts. I have a 125 main jet but have 130s at hand if necessary. But would like to get it idling first to...

Ok everyone, had another go yesterday. Had put the original idle jets back in and gave it a go. The bike started but would not idle. it ran as long as I revved it. As soon as it was warm I had to close the enricher off and it ran slightly better but still would not idle. At least now it will...

Thanks for the advice. Carbs were in a very bad state when I got them. I have replaced most parts as they were in a bad state. I even changed the floats just make sure. I will take on board all your advice and as soon as I am able to work on the bike again I will post an update.

The airbox chamber is stock and I even have the rubber liners that were stock. K&N filter on the side of the frame. I haven't messed with a bike for about 30 years so I am way out of practice. Made a couple of cafe racers back in the 80's and jetted the carbs getting a decent result out of them...

This morning on further research I found conflicting evidence regarding the main jet sizes. Clymer says they should be 128 and 130 but Boats.net (which I think I'll trust more) has both of them as 122. If boats are correct it makes more sense that 6sigma gave me 2 each of 125 and 130 (to choose...

Yes, it pops on deceleration and backfires when I rev it too. It also has throttle lag. It's difficult to keep it idling, but yes you're about right 1000/1400 rpm. I was getting very confused as I seemed to have the signs of it being too rich and to lean at the same time. I blew compressed air...

Yes those folks.

Just as I answered you question about the jets I was checking what standard should be and found that they should be different main jets. 128 and 132, so they don't seem to be right to start with. I trusted 6sigma with what recommend. Thanks for the advice, I dismantled the carbs last Saturday...

41 & 128