Belt primary drive conversions? - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
» Main Menu

Discussion Forums
 » Twins
 » Tiger
 » General
 » RAT

Features
 » Blogs

Motorcycle.com Links

Contribute
 » Photo

Motorcycle Forums
» Insurance
» Sponsors
» Our Partners
»ATV Reviews
»Motorcycle Games

Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

Reply
 
LinkBack Thread Tools Display Modes
Old 12-13-2012, 03:21 AM   #21 (permalink)
Senior Member
Powerbike
Main Motorcycle: T140E 1979
 
Join Date: Jan 2012
Location: UK
Posts: 326
Other Motorcycle: Yes
Interesting about the rockerbox breather, I have fitted a Bunn system to mine which breathes in from behind the crankcase and exits using the standard primary breather (bottom->bottom breather system) and I have found this has helped keep the top end leak free as I suppose it removes pressure from the top end,(I did have a slight prt weep but that has since stopped after fitting the breather kit), so that would be something I would have to think about if I was to consider sealing the primary off.
tribsa1954 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-13-2012, 03:42 AM   #22 (permalink)
Lifetime Premium
Site Supporter
Formula Extreme
Main Motorcycle: T100R Daytona special
 
Join Date: Mar 2010
Location: The Land of Oz
Posts: 748
Other Motorcycle: Ducati 748/853
Extra Motorcycle: Cagiva Mito
I originally fitted a Bunn breather kit, breathing in at the timing plug and out at the rockerbox both via the supplied one way valves.
Two things happened that I didn't like, first the valves were really noisy and had to be covered in silencing foam and second the "specially made" oil proof hose was very poor and started to crack at every bend after a few days.
So I simply got rid, refitted the timing plug and just fitted a hose to the exhaust rockerbox fitting same as I used to do back in the day.
Zero oil leaks anywhere for the last 700 miles.

Life is good.
Old Cafe Racer is online now   Reply With Quote Quick reply to this message
Old 12-13-2012, 06:26 AM   #23 (permalink)
Senior Member
Powerbike
Main Motorcycle: T140E 1979
 
Join Date: Jan 2012
Location: UK
Posts: 326
Other Motorcycle: Yes
Lol - yes the valves do make it sound like the old boys on a ventilator!

All the best
tribsa1954 is offline   Reply With Quote Quick reply to this message
Old 12-14-2012, 09:21 PM   #24 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: 1976 Triumph Bonneville
 
furious furball's Avatar
 
Join Date: Feb 2009
Location: Canoga Park, CA
Posts: 112
Quote:
Originally Posted by Old Cafe Racer View Post
I originally fitted a Bunn breather kit, breathing in at the timing plug and out at the rockerbox both via the supplied one way valves.
Two things happened that I didn't like, first the valves were really noisy and had to be covered in silencing foam and second the "specially made" oil proof hose was very poor and started to crack at every bend after a few days.
So I simply got rid, refitted the timing plug and just fitted a hose to the exhaust rockerbox fitting same as I used to do back in the day.
Zero oil leaks anywhere for the last 700 miles.

Life is good.
How in the world do you have next to no oil in your rockerbox outlet hose? I have the same set-up but with an inlet system in the TDC hole. My outlet hose goes up and then along the bottom of the fuel tank, down the OIF tank and out the bottom of the bike behind the gearbox. Each ride I have immediate drippage of oil from the blow-by gases which slowly puddles up to approx the size of a 5-inch circle before it finishes dripping about a day later.

I'm working on my solution this weekend which is installing an aluminum catch can from Pegasus Racing ($20) behind my side cover so its concealed. Both the inlet and outlet hoses have Krankvents in the correct direction of air flow. I figure with the catch can I will at least be able to control the oil out of the hose instead of leaving the usual Triumph signature wherever I park.

I've got another post on the forum about this but my last trick to perform is figuring out how to stop the gearbox oil from coming out of the foot change spindle hole (left side gear change). I currently added an o-ring on the foot change spindle where it meets up with the hole - that worked for most of my last ride but not the entire ride - at least minimalized the oil leak - however did cause the gear changing to be a bit tougher then with no o-ring.

Re: the original post - I too have a BNR belt drive and converted to dry clutch (as the above indicates). Love it so far, minus the oil drips as noted above I'm still working out. I highly recommend the BNR set up, sealed bearing, 7lbs of loss weight (brother-in-law says in rotational weight it likes removing 49 static lbs) and looks hella kewl. Uber easy to fit, direct replacement.

Last edited by furious furball; 12-14-2012 at 09:30 PM.
furious furball is offline   Reply With Quote Quick reply to this message
Old 12-14-2012, 11:07 PM   #25 (permalink)
Lifetime Premium
Site Supporter
Formula Extreme
Main Motorcycle: T100R Daytona special
 
Join Date: Mar 2010
Location: The Land of Oz
Posts: 748
Other Motorcycle: Ducati 748/853
Extra Motorcycle: Cagiva Mito
[quote=furious furball;2449650 How in the world do you have next to no oil in your rockerbox outlet hose? I have the same set-up but with an inlet system in the TDC hole. My outlet hose goes up and then along the bottom of the fuel tank, down the OIF tank and out the bottom of the bike behind the gearbox. Each ride I have immediate drippage of oil from the blow-by gases which slowly puddles up to approx the size of a 5-inch circle before it finishes dripping about a day later.[/quote]

Well that's all I have, I get about 2 drops in the catch bottle every 50 miles or so, it varies with how hard I rev the engine.
If I keep it below 4500rpm there is virtually nothing in it.
Catch tank is a carbon fiber wrapped plastic Castrol coolant bottle which sits comfortably between the front engine plates.
Attached Thumbnails
Belt primary drive conversions?-dscn1110.jpg  
Old Cafe Racer is online now   Reply With Quote Quick reply to this message
Old 12-15-2012, 12:25 AM   #26 (permalink)
Moderator
Team Owner
Main Motorcycle: Rickman T120
 
Join Date: May 2010
Location: Victoria Australia
Posts: 4,274
Other Motorcycle: T160,TR6
Quote:
Originally Posted by furious furball View Post
I highly recommend the BNR set up, sealed bearing, 7lbs of loss weight (brother-in-law says in rotational weight it likes removing 49 static lbs) and looks hella kewl. Uber easy to fit, direct replacement.
I think your brother-in-law should revise his mathematics.I estimate that primary chain surface speed is approx 0.64 times rear tyre circumference speed in top gear.
In 1st gear,primary chain speed is 1.6544 times tyre speed.

Even if all that mass was at chain pitch circle speed,it is effectively 3.737 x 7 lbs inertia =26 lbs of non-rotating mass,when the bike is in 1st gear.
In top gear,it's equal to 9.842 lbs of non-rotating mass.
Mr.Pete is online now   Reply With Quote Quick reply to this message
Old 12-15-2012, 06:15 AM   #27 (permalink)
Member
Grand Prix 250
Main Motorcycle: t120
 
Join Date: Apr 2010
Location: Winchester, Uk
Posts: 73
9 lbs of non-rotating mass!

stop eating burgers and you will lighten the bike + control system ( you) by much more than that.
Steve69 is offline   Reply With Quote Quick reply to this message
Old 12-15-2012, 06:50 AM   #28 (permalink)
Moderator
Team Owner
Main Motorcycle: Rickman T120
 
Join Date: May 2010
Location: Victoria Australia
Posts: 4,274
Other Motorcycle: T160,TR6
The steel capped boots could be a few lbs,+ a few beers gives a few more.
Mr.Pete is online now   Reply With Quote Quick reply to this message
Old 12-15-2012, 09:17 AM   #29 (permalink)
Senior Member
SuperSport
Main Motorcycle: T110 Triton
 
Triton Thrasher's Avatar
 
Join Date: Nov 2012
Location: Darkest Pulteneytown
Posts: 1,343
If we're talking about home made breathers, I think the sensible way to do it on a unit Triumph is through the crankcase front mounting lug. Requires the engine to be split, for drilling through from the crankshaft space and drilling and tapping for the outlet spigot and packing the lug with knitted nylon pot scrubber material. That gives you an oil catcher and scope for a vertical pipe run from the crankcase.

Also doesn't involve making Mr Bunn rich in exchange for some rather paltry pipes and valves.
Triton Thrasher is offline   Reply With Quote Quick reply to this message
Old 12-15-2012, 06:15 PM   #30 (permalink)
Lifetime Premium
Site Supporter
Formula Extreme
Main Motorcycle: T100R Daytona special
 
Join Date: Mar 2010
Location: The Land of Oz
Posts: 748
Other Motorcycle: Ducati 748/853
Extra Motorcycle: Cagiva Mito
I don't think Mr Bunn is getting rich on his breather kits but quality wise it had no place on my bike.

I also tried using the redundant tacho drive with the guts removed (electric tacho) as a breather point but it threw too much oil out being too close to the crankshaft/flywheel so the rockerbox cover it was.

Mine's also a 500 so breathing through the cast in engine mount isn't an option but that said I wouldn't even consider it for the same reason as the tacho drive (and the timing plug one I also tried) one didn't work for me.

.

Last edited by Old Cafe Racer; 12-15-2012 at 06:28 PM.
Old Cafe Racer is online now   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
BNR Primary Belt Drive T100Rforme Member's Restoration & Rebuild Projects 6 06-27-2011 06:12 AM
Primary Belt Drive? Webby Classic, Vintage & Veteran 72 01-24-2011 05:23 PM
Belt Drive Primary Benefits Ken Reece Classic, Vintage & Veteran 3 09-07-2009 02:51 PM
belt primary drive for '69 T100? NHOJ from Maine Classic, Vintage & Veteran 5 07-24-2008 10:28 AM
Phase 3 belt primary drive? jimmyjam Classic, Vintage & Veteran 4 10-28-2005 02:08 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 07:42 AM.



Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Search Engine Optimization by vBSEO 3.6.0