The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: Drew Back on 15.08. 2014 14:28

Title: Primary chain rubbing
Post by: Drew Back on 15.08. 2014 14:28

Got my primary all together now chain alighnment pretty good seems like duplex primary chain is rubbing cases behind clutch basket I do have a clutch thrust washer installed Do I need a thicker washer seems like the one Im using is pretty thick any one have a good pic of what it should look like??I do have the sloped part facing the tranny I think that is the right way around..

Title: Re: Primary chain rubbing
Post by: muskrat on 15.08. 2014 21:08

G'day Drew. Probably a silly ? but have you installed the abutment ring (two halves) behind the thrust washer?
Cheers

Title: Re: Primary chain rubbing
Post by: Drew Back on 16.08. 2014 04:55

No not silly I dont have that part or see it in the book?? Do you have a good pic of how this all goes together like a real time photo??I will be away for weekend but will try to get pics up of what I have sunday.

Title: Re: Primary chain rubbing
Post by: duTch on 16.08. 2014 05:25

 Good lateral thinking Musky, no 'ifs and or buts/butts'  about it-  *conf*
 

 Drew, in the parts book- item # 74 p/n 67-3251

http://www.draganfly.co.uk/index.php/accessories-a-misc/product/14326- (http://www.draganfly.co.uk/index.php/accessories-a-misc/product/14326-)

Title: Re: Primary chain rubbing
Post by: morris on 16.08. 2014 09:47

Hi Drew,
ring looks like this, and fits in the groove on the gearbox shaft behind the chain wheel

Title: Re: Primary chain rubbing
Post by: Drew Back on 16.08. 2014 11:56

Thank You for the pic I shall have to look for that piece in my parts jumble..Will let you know how I make out..

Title: Re: Primary chain rubbing
Post by: Drew Back on 17.08. 2014 21:57

I could not find that piece anywhere in my stash I guess I need to order it..This is what I have..

Title: Re: Primary chain rubbing
Post by: duTch on 17.08. 2014 22:33

 So just add to Morris, when they arrive, (obviously if in one piece you'll split them) check they fit in the recess in the back of the thrust plate, then hold 'em in place in the groove in the mainshaft with some grease......good luck