BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorThe Bonneville ShopBritBike Sponsor
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments.
Buy BritBike staff a coffee
Buy BritBike's staff a coffeeStill here since 1996 serving BritBike enthusiasts..
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Member Spotlight
Gunk
Gunk
Canada
Posts: 1,011
Joined: March 2006
Show All Member Profiles 
Newest Members
rudi, Derek, Psychorider, Shedengineering, Shayne Brown
10860 Registered Users
Top Posters(30 Days)
franko 172
reverb 64
DavidP 63
NickL 59
Popular Topics(Views)
1,005,864 mail-order LSR
a word from..
Forum Statistics
Forums34
Topics67,747
Posts679,979
Members10,860
Most Online14,755
May 5th, 2019
Who's Online Now
38 registered members (Andrew Dunham), 277 guests, and 487 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Front sprocket, early 5-speed #783338 09/03/19 5:47 am
Joined: Oct 2008
Posts: 5,682
DavidP Online Content OP
BritBike Forum member
OP Online Content
BritBike Forum member
Joined: Oct 2008
Posts: 5,682
The front sprocket on my 72 T150V needs renewal. Part number in book is 57-4398, which is an 18-tooth.
Part number in the book for my 72 T120V is 57-4397, which is a 19-tooth. I might prefer the 19-tooth for the Trident.
Part number in my 74 T150V book is 57-4784.
Problem is that the only one which I'm sure will fit is the 57-4398, which is difficult to find.
What is the difference?


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
72 T120V cafe project "Mr. Jim"
72 T150V "Wotan"
Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK
British motorcycles on e-Bay North America
Re: Front sprocket, early 5-speed [Re: DavidP] #783403 09/04/19 3:46 am
Joined: Jan 2004
Posts: 4,216
D
DMadigan Offline
BritBike Forum member
Offline
BritBike Forum member
D
Joined: Jan 2004
Posts: 4,216
If yours is the early five speed with the Hoffman bearing (11 rollers) the later sprocket from Wenco will not fit without trimming the splines in the sprocket (unless mine was an aberration). It slide right on the 4372 high gear but not the earlier. See my Wenco Framed Triple Racer posting. Maybe the UK sourced sprocket will fit.
The high gear seal I.D. changed on the later sprockets. Your early seal will not fit the later sprocket. You will have to replace the seal with the sprocket. The seal supplied is only single lip. Double lip seals are not available as far as I could find. I had to make a new seal holder for a standard 47x60x8mm double lip seal.

Re: Front sprocket, early 5-speed [Re: DavidP] #783577 09/06/19 4:07 am
Joined: Oct 2008
Posts: 5,682
DavidP Online Content OP
BritBike Forum member
OP Online Content
BritBike Forum member
Joined: Oct 2008
Posts: 5,682
Thanks Dave,
I found the correct sprocket from Rask. I'll check the seal once I have the old sprocket off. I think the early ones also have an O ring, and sealant on the splines is always a good idea.


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
72 T120V cafe project "Mr. Jim"
72 T150V "Wotan"

Moderated by  Alan_nc 

Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.3