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21
Technical / Re: Gearbox
« Last post by timsdad on October 22, 2017, 09:25:52 AM »
It's all about the elimination of what it isn't, Steve, and we're still not sure if it's the gearbox not actually engaging the gears or if the clutch is preventing them from snicking in when they should with the motor running.

You state that the gears 'seem' to go in with the motor stopped but it's easy enough to establish if it's indexed correctly, all is fine in there and the reductions are getting as far as the output sprocket. With the rear wheel off the ground, and the sparking plug removed, you should be able to go from neutral up to first gear by rocking the back wheel without using the clutch. The gears should then slide down into second by the same process and then another snick into top gear and all the way  back again. If it feels ok, but you're still not sure if it is actually going from first into second, and then into top gear, it's easy enough to count how many engine revolutions are needed to give one turn of the real wheel.

When you've checked out the gearbox then it's time to point out that the end of the clutch cable needs to be at the correct angle, cable is free and has no sharp bends, clutch has no wobble, push rod is the correct length, bearing is still in the gearbox actuator, etc etc.


Ray
22
Technical / Re: Gearbox
« Last post by Owen on October 22, 2017, 07:21:42 AM »
Can you try the following.When on the bike, lift or lower the gear leaver to the desired gear and hold it in that position until you have engaged the clutch.
23
Technical / Gearbox
« Last post by stev60 on October 22, 2017, 06:23:22 AM »
Better move this topic out of the bike pump question, Ray I have checked the clutch everything looks good, its all new and ive dressed the plates with a diamond plate to clean them up, new chainwheel, and clutch plate and springs, cable is new, as is clutch shaft. everything looks right. The gearbox will engage at low revs without clutch, but not when clutch is engaged,. I did have the box apart to replace main bearing and seal , bushes and two gears that had lost a few teeth and built up and filed by hand to fit by someone in the past. Ive double checked the selector spring it finds neutral ok and all gears, by hand. Im probably looking at something simple I hope :) 
24
Technical / Re: Tire hand pump
« Last post by bangers-c10 on October 21, 2017, 01:42:30 PM »
 :)
25
Technical / Re: Tire hand pump
« Last post by Pat on October 21, 2017, 01:28:54 PM »
1940 frame but pump on the right side. All the bits are right so probably the orig Civilian tank.
26
Technical / Re: Electronic ignition and alternator to switch panel wiring
« Last post by johnboyfully on October 21, 2017, 01:26:54 PM »
Thanks Ray I’ll check output from Reg/Rec and AC from alternator, thanks for the advice JBF
27
Technical / Re: Electronic ignition and alternator to switch panel wiring
« Last post by timsdad on October 21, 2017, 12:02:40 PM »
The DC output from the rectifier doesn't normally go directly to the battery, JBF, but, as I tried to explain in simple language, it first goes to the switches to feed (via what seems to be your black and purple wires) what is needed to power everything whilst it's running. The excess DC power then travels back to charge the battery.

This same wire can then supply the switches when there's insufficient coming into the system from the rectifier.


Ray
28
Technical / Re: Tire hand pump
« Last post by bangers-c10 on October 21, 2017, 11:02:45 AM »
yes mine has pump on right and fuel tap on left Ron,
cool photo Thomas, nice tank.
ok thanks Ray, yeah i was wondering about that,


gearbox--sounds clutch related
29
Technical / Re: Electronic ignition and alternator to switch panel wiring
« Last post by johnboyfully on October 21, 2017, 09:09:26 AM »
It's a 2 wire alternator. So both green/yellows from alternator to 2 greens on the reg/rec. The black wire on reg/rec then connects to the purple wire to number 13 in the switch panel (there is of course a red earth on the Reg/rec). There is no direct connection between the reg/rec and battery. Is this effected by going through number 13 in the switch panel? Of course I may have a short or bad connection somewhere, but on a YouTube video on the subject there was a direct connection between reg/rec and battery. I can test alternator output while bike is running and look for shorts and bad connections but is my charging system wired correctly? JBF
30
Technical / Re: Tire hand pump
« Last post by timsdad on October 21, 2017, 07:30:19 AM »
Not enough information, Steve, - does it grind when trying to go in? If so, then it's probably that the clutch plates need balancing so they spin true. Or maybe there's insufficient lift on the pressure plate - too much slack in the cable and linkage.

These three-speed gearboxes don't have much adjustment so everything has to be set up just right to make good use of the little bit of leeway that there is.

Ray
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