Why do I keep on destroying the plastic bobbin in the speedo drive?... What would cause that to damage everytime I ride a bit harder than usual? Like by the time I hit 3rd gear then the damn thing is busted...

Dunno but it seems to be fairly common.

Someone was making alloy replacements on here (Gazzah??).

hmmm... bugger... I repaired my 1st one with some metal inserts... that worked for a long time until the side that fits the nut/bolt head of the sprocket got a bit rounded... so i used the one out my brothers NC29 cause he wasn't using the bike... and today after using it for only a few days.... it decided to stop working

Now I need to replace his and mine...

no luck!!!!!

sounds like its your speedo gear. remove it off your sprocket cover, and check it for any sign of notchiness when you turn it, even a wee bit would be enough to round off your plastic insert bit.

this has just been my problem very recently

Make sure the cable and the housing on the sprocket cover are lubricated, I`ll get a couple made up in aluminium meantime.

I cleaned and lubed the speedo cable today as it seemed a bit 'sticky' and was probably the cause of the problem...

What will the aluminium ones cost? and what will postage to South Africa be?...

Finally managed to get some alloy ones made, £6.50 posted to Uk, £7.00 worldwide. Mail me at gazzahh<at>aol.com if anyone is in need of of one

mine arrive yesterday buddy,fitted it and did about 200 miles,100 of them giving the bike some pretty hard times and the other 100 motorway miles
took it out today and they is no wear on it at all,deffo a cracking piece of kit and a much needed one after the other ones being so cheap and useless
and at 6.50 a bargain expect another mail ....

Will these work on an NC24?