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Topics - Aye Gee 1977

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CB350/400 / Arcing points
« on: March 22, 2024, 03:23:08 PM »
It's a standard battery and coil system
Points 1-4 are arcing excessively - the spark is much the same as at the plug and it causes a misfire, which clears for a while when the points are cleaned.
The condensers are new pattern DS parts; I've tried swapping them over with the 2-3 set and also returned the original (40 years old) one.  Whilst you can convince yourself that there is a marginal difference, before long it's points 1-4 that are troubling.
The LT resistance of the coil is 4.2 ohms (same as the other coil).  I can't yet see how it can be caused by the HT side but nevertheless it has a resistance of 30.9k ohms (only 23.4k ohms for coil 2-3).  The plug caps are 8.3k & 8.6k (4.3kx2 for plug caps  2-3 - which are a longer reach type).
New set of NGK plugs.
Any thoughts on what is causing the arcing would be most welcome

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CB350/400 / CB400F2 - Petrol tap
« on: January 04, 2024, 04:02:47 PM »
After a mere 40 years on non-use, I thought now was the time to restore my beloved 400 - bought new when 1 was 17 years of age and then ridden to death before being retired at 65,000 miles

I have had a few problems - the rear hub housing was worn due to the bearing turning within; this was a recurring issue when in regular use.  Not noted previously, the sleeve between bearing and axle on the drive side has worn - presumably it was turning on the axle rather than the bearing; fortunately the spindle is unscathed.  Anyway, all stripped down including splitting the crankcases (for the second time in my ownership) and now being reassembled.  The chrome plating seems to be taking an age - it won't be long before it is holding things up.  I just hope they haven't lost anything.

Parts are not too hard - but I can't find a rear mudguard (so had to patch the holes with fibreglass(!).  I managed to dismantle the horn such that it now makes a noise of sort - and only broke the plastic a little when reassembling.




Anyway, I did a silly thing and applied some heat to the petrol tap to loosen its screws - which was successful!  I now know there is a tapered nylon bush inside - with a low melting point.  Does anyone have a spare bush or bustd tap, please?  If it matters, it has a 20mm thread.

If not, can anyone speculate whether (and which ideally which) of the cheapo petrol taps on ebay  might yield a suitable innard

Thanks

 

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