2 quick questions on front sprocket change

Message

dyzio · #1 Post by **dyzio** » Sun Feb 07, 2010 11:55 pm

Hi all,
I've decided to put a 15T sprocket in:
- does the sprocket bolt have a standard or a "reverse" thread?
- threadlock - what do you use? I've got some Locktite 222, but maybe I could source something else from work.

Thanks

tommy · #2 Post by **tommy** » Mon Feb 08, 2010 1:10 pm

I dont remember if it has a reverse thread on it. Im 90% sure it didn't
I also didn't use thread lock - just torqued it up with my torque wrench (I forget what it is - will have to check hanez manuel)

dyzio · #3 Post by **dyzio** » Mon Feb 08, 2010 1:18 pm

50Nm :)

Thanks

D-Rider · #4 Post by **D-Rider** » Mon Feb 08, 2010 1:36 pm

Yes... I also can't remember for sure but I think it was a normal thread.
Threadlock is a good plan .... someone's came undone (was it Bigun?) and it made an awful mess

#5 Post by **mangocrazy** » Mon Feb 08, 2010 2:05 pm

Just been checking, and while Loctite 222 is certainly better than nothing, I think Loctite 243 might be better suited. This is the blurb:

Loctite 243 Threadlocker 10ml

A removable strength, general-purpose threadlocking adhesive especially well suited for fasteners between 1/4" and 3/4" diameter. Tolerant of oil and other contamination. Protects threads from rust and corrosion. Cures reliably even on stainless steel. Available Worldwide
Specifications:

Machine tools, presses, pumps, compressors, mounting bolts, gearboxes.
NSF/ANSI 61
24078

I must admit seeing the word 'gearboxes' encouraged me...

Falco9 · #6 Post by **Falco9** » Mon Feb 08, 2010 2:46 pm

Loctite 243 is the one to use. Aprilia actually state it must be used in their workshop manuals.

Don't over tighten the bolt, they have a habit of the head shearing off, just the std 50nm torque is fine.

The bolt is std right hand thread so should self tighten on itself as the sprocket turns, but as Andy has mentioned a few have come loose with nasty consequences

The sprocket bolt on my brand new Tuono was only in finger tight, so its worth checking the bolt every now and then

F9

dyzio · #7 Post by **dyzio** » Mon Feb 08, 2010 2:50 pm

Thank you.

dyzio · #8 Post by **dyzio** » Fri Feb 12, 2010 11:15 am

All done,
Took it easy today, but the 15T made a nice change to the bike. Feels a lot smoother at lower rev's now.
Tweaked the shock a bit as well, and I've found a place to set it up properly as well.

This might be a good year

:)