Is there an easy way? Book shows timing with head off to 3/8" BTC. I have mag w/auto advance. Top end has new pistons. I timed with head off but won't start. I have compression,spark and gas. I have a dial indicator for plug hole and reset timing only got a pop but still won't run. But that is more then I had. Timed again and still won't run. I did not put bottom end together so I might check the engine timing but seem ok. Valve adjustment seem good.Plug has spark when pulled and kicked over.
Did you lock advance unit at full advance? I also found on mine that a dial indicator in plug hole will not read correctly due to piston crown and angle of indicator rod. If you started with the head off OK, but if you changed things after that then you're going to have to use another method of locating 3/8. I made a fixture that fits on the drive side of the crank for a degree wheel but there have been several explanations on here about useing a piston stop and marker rod.
1960 BSA A10 2007 Suzuki Bandit 1957 A10 (Used to be a Triumph here) 71 Norton Commando
Yes on compression stoke, swapped leads, yes locked full advance. I have done it before but this just don't want to run. I have made an some thing out of spark plug to try hope it work better then dail indicator. Thanks again.
it's been both some time wet some time dry. Retimed again and still didn't start. Going to try different carb and see if that works. Going to pull one off one of my other A 10 and try that. I have a feeling it's carb. Timing got to be close enought o get it to start. Hate to pull head off again.
I check timing on cam and crank reset it. I pulled mag and clean all the brass up and put it back together and retimed mag and now she rumble and pops like it want to start.I think she is flooding or my timing off a little but I have made progess.
If I attach a degree wheel what degree do I want it to fire at BTC????
I got it to fire for a bit (1 minute or so several times now) I have tried several carbs get same results. All the carbs are pieces put together. Seem to run but when I twist throtle she dies out. I have AMAL 389 (with about 1 1/8" open) it calls for 376. 240 main jet, needle position 3, no choke I have 2 different size needle 1 is 3 3/4" long and 1 is 4 1/8" long so I might have the wrong needle in it. I have looked at AMAL charts but no info on lenght of needles. Thanks for the help. I'm getting closer.
It might be faster and easier just to borrow a Concentric from a running bike. doesn't matter what size, just that idled and took throttle. If it cures the problem, you then fix your carb. if not it's back to the grind.
I have try everything. But I can only get it to rumble but not run. It starts almost every kick but short rumble and that it. Fitted a new AMAL 1 5/32 with 310 main jet, 25 pilot, no 3 slide. .106 needle jet and have try needle in 2 and 3 position. Rechecked the motor timing and the mag timing. Please help!
Red; on a recent posting you mention different length needles the AMAL 389 takes a "D" needle (the longest) look at the top of the needle above the grooves and you should see a stamping identifying the type... "D" is what you want in a 389. Also try to run the bike with the fuel tank cap off or open ,maybe you have a venting problem and the fuel isn't flowing to the carb freely.The set up you mention above is pretty standard for an A10.In mine I use a 30 pilot,but what you have should work at least to get it running.also are you trying to start with the carb "tickled",and the choke on ???? It certainly sounds like there isn't enough fuel to support running.
In addition to my previous post.The most important setting on any carb before you do any adjustment is the float level.On the AMALMonobloc the level of fuel should be up to the pip or nub on the float cover .
I going to put a clear gas line to see if the flow is there. Yes I have been tickled it but no on the choke but I do have it but didn't have the right cable to put on so I plugged the hole for the cable. I'm going to make a cable to fit the choke on. It seem funny that it won't start on ether. But will fire over on gas.
Still no luck. Question if when kicking the kick starter and the primary side of the crank rolls in a counter clockward direction to set before tdc I would go back in a clockward correct? It has compression it has spark and gas. So my issue is timing. Thanks
Yes--get TDC then for the timing point turn the engine backwards (clockwise from the primary side) for the correct amount for the timing point BTDC. Remember to set the AAU in the fully advanced position or if manual advance/retard set the lever in the fully advanced position. HTH
I runs I was timing after TDC . I tap the crank shaft put degree wheel on and notice direction and when timing by inches before I was going the other way. (fun getting old I own this one for 40+ years)
Thanks to all that posted.
Now there is no oil returning to tank. I have notice a lot of oil in the oil pump cavity so it might not be seated correctly. If I was to buy a new one what's a good brand??