BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
JWood Auctions JRC Engineering dealers JWood Auctions
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
Posts: 100
Joined: December 2001
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
39 registered members (Adam M.), 227 guests, and 123 spiders.
Key: Admin, Global Mod, Mod
Newest Members
urbanghost, Richard313, Gordo, to.bias, Nomdegom
10383 Registered Users
Top Posters(30 Days)
NickL 98
Mori55 88
Stuart 77
reverb 75
DavidP 72
Triless 71
Rohan 69
btour 66
Popular Topics(Views)
689,466 mail-order LSR
Forum Statistics
Forums34
Topics68,027
Posts661,819
Members10,383
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
TR6 With Mikuni problems - newbie help! #110274
02/17/07 5:33 am
02/17/07 5:33 am
Joined: Sep 2005
Posts: 131
Tasmania, Australia
porge Offline OP
BritBike Forum member
porge  Offline OP
BritBike Forum member

Joined: Sep 2005
Posts: 131
Tasmania, Australia
OK - Before 'Tiger' says "stick a Concentric on there already", I'll give the mikuni ONE last go. confused

So - after cleaning the float bowl of the accumulated crap to stop petrol spewing out of the bell mouth, the throttle became sticky. So I took the tank off to get a better look. Stopped sticking. Tank on - no problems.

Restarted, "idling" about 3K rpm or so. Before this point, the bike would idle at an indicated 800rpm. The throttle slide moves smoothly up and down the bore of the carb with the twist grip, about a 10-14mm gap between the bottom of the bellmouth and the cutout on the slide.

So - convinced I need to take this thing apart - what does the accumulated and much appreciated knowlege of the group think??


1969 Triumph TR6R
1956 Matchless G80S
1964 Royal Enfield 350 Bullet
1964 Honda CD125
Support Your #1 BritBike Forum!

Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Check out British motorcycles for sale:
British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: TR6 With Mikuni problems - newbie help! #110275
02/17/07 4:22 pm
02/17/07 4:22 pm

A
Anonymous
Unregistered
Anonymous
Unregistered
A



A guess?
The cable isn't fully seated in the slide.

Re: TR6 With Mikuni problems - newbie help! #110276
02/17/07 6:01 pm
02/17/07 6:01 pm
Joined: Sep 2001
Posts: 69
Melbourne, Australia
MikeTRP Offline
BritBike Forum member
MikeTRP  Offline
BritBike Forum member

Joined: Sep 2001
Posts: 69
Melbourne, Australia
Floats upside down.

Re: TR6 With Mikuni problems - newbie help! #110277
02/17/07 6:01 pm
02/17/07 6:01 pm
Joined: Apr 2002
Posts: 716
Out There!
N
Nick Offline
BritBike Forum member
Nick  Offline
BritBike Forum member
N

Joined: Apr 2002
Posts: 716
Out There!
There must be a small amount of play in the twist grip before it begins to lift the slide. Use the adjuster on the top of the carb to achieve this. Then, when you open and release the twist grip you must be able to hear the slide come to a stop on the idle screw. Don't start the bike without both of the above conditions being met. Also make certain that the cable runs smoothly from carb to grip, turn bars from lock to lock to make the slide does not lift while doing so.
The Mikuni is one of the best motorcycle carburetors ever made. If you're having problems with it, don't blame the carb.


When people who should have known better cautioned me about the dangers of motorcycle racing, I always told them that a fear of death is nothing more than a fear of life in disguise.
Re: TR6 With Mikuni problems - newbie help! #110278
02/18/07 12:36 am
02/18/07 12:36 am
Joined: Sep 2005
Posts: 131
Tasmania, Australia
porge Offline OP
BritBike Forum member
porge  Offline OP
BritBike Forum member

Joined: Sep 2005
Posts: 131
Tasmania, Australia
OK - About to go back to shed.

Mike - Floats are marked with an up position, so I hope I'm good on this one wink That said...the little "knibs" off the floats - do they face in towards each other, or "out" - away from each other?

Nick - will check out the cable routing and the amount of play in the twistgrip.

Panic - will check when I do the above


1969 Triumph TR6R
1956 Matchless G80S
1964 Royal Enfield 350 Bullet
1964 Honda CD125
Re: TR6 With Mikuni problems - newbie help! #110279
02/18/07 1:43 am
02/18/07 1:43 am
Joined: Mar 2005
Posts: 460
Cincinnati, Oh
Jethro Offline
BritBike Forum member
Jethro  Offline
BritBike Forum member

Joined: Mar 2005
Posts: 460
Cincinnati, Oh
Just want to say something about Mikunis. I have an old, rigid chopper (t120), and am running dual 26mm Mikunis. It WAS quite a chore to get them tuned. I BOUGHT the manual from SUDCO!!! I can not recommend enough how much that manual saved me, and how great a resource it was. Someone on this board recommended it... THANK YOU! Now, once I got them running well, they have NEVER hiccuped... and they run like striped-*** apes. GREAT carb, I kid you not.

Re: TR6 With Mikuni problems - newbie help! #110280
02/18/07 3:56 pm
02/18/07 3:56 pm
Joined: Apr 2006
Posts: 1,708
Virginia, USA
SBoyd Offline
BritBike Forum member
SBoyd  Offline
BritBike Forum member

Joined: Apr 2006
Posts: 1,708
Virginia, USA
Slide is in backwards, cutaway should face engine


Stop the insanity.
Re: TR6 With Mikuni problems - newbie help! #110281
02/18/07 4:14 pm
02/18/07 4:14 pm
Joined: May 2005
Posts: 3,846
ohio
shel Offline
BritBike Forum member
shel  Offline
BritBike Forum member

Joined: May 2005
Posts: 3,846
ohio
Quote:
Originally posted by SBoyd:
Slide is in backwards, cutaway should face engine
confused


When given the choice between two evils I picked the one I haven't tried before
Re: TR6 With Mikuni problems - newbie help! #110282
02/18/07 4:39 pm
02/18/07 4:39 pm
Joined: Apr 2006
Posts: 1,708
Virginia, USA
SBoyd Offline
BritBike Forum member
SBoyd  Offline
BritBike Forum member

Joined: Apr 2006
Posts: 1,708
Virginia, USA
Yes Shel, I too am puzzled by my own remark!!!!
?????
I did not properly read the original post.
(one of my pet peeves as well)


Stop the insanity.
Re: TR6 With Mikuni problems - newbie help! #110283
02/18/07 4:53 pm
02/18/07 4:53 pm
Joined: May 2005
Posts: 3,846
ohio
shel Offline
BritBike Forum member
shel  Offline
BritBike Forum member

Joined: May 2005
Posts: 3,846
ohio
I thought maybe you were having a little fun with us laughing


When given the choice between two evils I picked the one I haven't tried before

Moderated by  John Healy 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.2