The BSA A7-A10 Forum

Technical => Lucas, Electrical, Ignition => Topic started by: a10sausage on 06.12. 2010 21:15

Title: lucas k2f gear drive pinion
Post by: a10sausage on 06.12. 2010 21:15
hi folks
           the gear drive fibre pinion for my manual advance / retard magneto has some damage to the teeth and i would like to replace this with an alloy version..how do i remove the old fibre  gear  pinion it seems to be riveted all the way through the metal pinion centre holder that grips the mag and does anybody know where i can purchase a metal or alloy version...srm used to sell them but i cant find them on there website anymore
   
Title: Re: lucas k2f gear drive pinion
Post by: MG on 06.12. 2010 21:34
You won't need the steel centre, since the ally pinion for the manual mags will mount directly on the shaft. No need to take the old one apart!

Draganfly used to have the aluminium pinions, deGroot BSA in the Netherlands have them listed as well (can't link directly, visit http://www.degroot-bsa.nl/ (http://www.degroot-bsa.nl/) and search for "67-0540"). Probably SRM will be able to supply one as well, you might have to drop them an email or call them.

Cheers, Markus
Title: Re: lucas k2f gear drive pinion
Post by: a10sausage on 06.12. 2010 23:07
thanks markus

thats very helpful
Title: Re: lucas k2f gear drive pinion
Post by: a10sausage on 07.12. 2010 13:15
if i decide to use a new fibre gear wheel..does any body know the exact size of the rivets and how do i split the old one from its casing !
Title: Re: lucas k2f gear drive pinion
Post by: RichardL on 07.12. 2010 14:08
I recall seeing that the rivets can be bought in a set. I will try to help locate same when not thumb typing and with better internet access.

Richard L.
Title: Re: lucas k2f gear drive pinion
Post by: iansoady on 07.12. 2010 15:10
There was a topic all about this a few weeks ago. In fact there was someone who'd bought 100 rivets and was offering them.

Here in fact (http://www.a7a10.net/forum/index.php/topic,3088.0.html)
Title: Re: lucas k2f gear drive pinion
Post by: Stu55Flash on 07.12. 2010 20:24
It was me. If you PM me with your address i will post you some for the cost of the postage. The rivets are 3/16 * 1". I know these are ok for the auto advance can you check these are the correct size for the manual advance.

Stu
Title: Re: lucas k2f gear drive pinion
Post by: a10sausage on 07.12. 2010 23:43
a very kind offer stu55flash .....but i have just spotted this and have decide to go the whole hog  http://www.srmclassicbikes.com/catalogue/index.php?target=products&product_id=614  and refurb my old gear sometime later...but when i do decide to do the job how do i get the old rivets off, do i grind them, and do i need a rivet gun to put the new ones on..i know this sounds a bit daft but i have never done any riveting...cheers folks!
Title: Re: lucas k2f gear drive pinion
Post by: Stu55Flash on 08.12. 2010 00:06
Drill the heads out without damaging the counter sink. Then trim the rivet to a length with an extra 3/4 (rule of thumb) of the rivet diameter than the width of the parts to be riveted together. Then whilst ensuring that the parts are held together and support the other head end of the rivet on the vice or something solid, pein over (with a ball pein hammer) the end of the rivet to fill the counter sink or create a dome head. A larger number of small taps rather than a few big hits, I used a metal plate to protect the fiber gear while I did the riveting. Finish this with a rivet set for a domed head if you have one, or file flush the counter sink.

Stu
Title: Re: lucas k2f gear drive pinion
Post by: a10sausage on 08.12. 2010 10:48
stu thats fantastic info..i now have enough info to do the job ...its really appreciated !