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wrist pin reamer for 650 bonneville #433411
05/05/12 4:00 am
05/05/12 4:00 am
Joined: Jan 2004
Posts: 701
vancouver,b.c.
black13 Offline OP
BritBike Forum member
black13  Offline OP
BritBike Forum member

Joined: Jan 2004
Posts: 701
vancouver,b.c.
can some one tell me the size of reamer to use for new bushing at wrist pin on triumph 650 bonneville ...seems i forgot to check them with my new pistons ...now i see i have to replace them on one side as there is a bit of play .....oops should have done it when i had them on the bench ! thank you ....i did my cam bushes fine and they are nice ! ...so i know i can ream the wrist pins ...thank you again for all the help advice , general slander !


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Re: wrist pin reamer for 650 bonneville [Re: black13] #433462
05/05/12 1:51 pm
05/05/12 1:51 pm
Joined: Oct 2003
Posts: 11,268
North Georgia, USA
RF Whatley Offline
BritBike Forum member
RF Whatley  Offline
BritBike Forum member

Joined: Oct 2003
Posts: 11,268
North Georgia, USA
Use an adjustable reamer, not a fixed reamer, so you can get the right fit. The nominal bushing IDs are in fractions of an inch.


Don't hide 'em, Ride 'em !!

RF Whatley
Cornelia, GA
Re: wrist pin reamer for 650 bonneville [Re: black13] #433700
05/07/12 8:24 am
05/07/12 8:24 am
Joined: Sep 2008
Posts: 728
angeles city, rp
J
jaycee Offline
BritBike Forum member
jaycee  Offline
BritBike Forum member
J

Joined: Sep 2008
Posts: 728
angeles city, rp
i know the factory service manual calls for a light push for correct fit,zero clearance on an inaccurate ream fit.why not have them honed for a more accurate, truer,fit? just my two cents worth.

Re: wrist pin reamer for 650 bonneville [Re: black13] #433757
05/07/12 5:16 pm
05/07/12 5:16 pm
Joined: Jan 2004
Posts: 701
vancouver,b.c.
black13 Offline OP
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black13  Offline OP
BritBike Forum member

Joined: Jan 2004
Posts: 701
vancouver,b.c.
Ya i was but i put the engine together already!


"HOUSTON, WE HAVE A PROBLEM"
Re: wrist pin reamer for 650 bonneville [Re: black13] #433793
05/07/12 8:17 pm
05/07/12 8:17 pm
Joined: Mar 2005
Posts: 10,251
Boston, Massachusetts
J
John Healy Offline

BritBike Forum member
John Healy  Offline

BritBike Forum member
J

Joined: Mar 2005
Posts: 10,251
Boston, Massachusetts
The pin fit is only half the job. The other part is making sure that the new bushing holds the pin parallel with the big end. Even honing the bushing does not insure that the bushing is finished to size and square.

If the piston is cocked side to side, oil control can be an issue, and it puts undue stress on the rod and rod bearing.


Re: wrist pin reamer for 650 bonneville [Re: black13] #433878
05/08/12 8:17 am
05/08/12 8:17 am
Joined: Oct 2003
Posts: 3,706
Emsworth, sunny south of Engla...
D
dave jones Offline
BritBike Forum member
dave jones  Offline
BritBike Forum member
D

Joined: Oct 2003
Posts: 3,706
Emsworth, sunny south of Engla...
I had to replace a small end bush on my 3TA and just followed the manual, not knowing that it was better to have them line bored when stripped. Anyway, I took the whole bottom end down to the garage and explained what had to be done. You have to line ream them using the other small end as a guide. It was ok and the bike ran fine. I checked the pistons after a fair bit of running and they were fine. Was only a 3TA though. As a teen I wouldn't have relished stripping the whole bottom end for one small end bush! Line boring is a safer bet.

Dave

Dave


Moderated by  John Healy 


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