Blocked pilot jet? - 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 05-18-2011, 09:01 PM   #1 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: TR6
 
mal.com's Avatar
 
Join Date: Apr 2010
Location: Tomakin NSW Australia
Posts: 141
Other Motorcycle: last other bike BMW R90S
Blocked pilot jet?

Hi all
I am rebuilding my 69 TR6. The F@#$%^&*()(&^%^%ing thing wont start. It was starting perfectly but sucking air. I polished the flange made a new gasket and cleaned the carby and now it will not start at all. In cleaning the carby somehow I have completely blocked the pilot jet

I have watched Plewseys vid (thanks for posting mate, it's a brilliant resource ) on Amal care several times, on trying to blow air through my pilot jet, it is completely blocked. I can insert a guitar wire apparently through the jet from the side opening.

But the on trying to blow air through the jet from the fuel bowl side opening, as shown on the video, it is blocked, on sucking or blowing.

I have tried carby cleaner and compressed air through all the openings.

Whats next?

cheers

Mal
mal.com is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-19-2011, 12:25 AM   #2 (permalink)
Moderator
Team Owner
Main Motorcycle: Rickman T120
 
Join Date: May 2010
Location: Victoria Australia
Posts: 4,192
Other Motorcycle: T160,TR6
You should be able to push a wire (0.016" diameter or less) at least 1-1/2" (usually 1-9/16") into the carb body if the pilot jet is clear.
There are also 2 holes near the front lower edge of the slide which should be clear;idle discharge holes.

Its not such a good idea to file or sand the flange flat.This still leaves the O-ring groove bent and the slide bore distorted;and the slide possibly jamming.Staightening the flange (and everything else) is a better option,though it is more involved.
Mr.Pete is offline   Reply With Quote Quick reply to this message
Old 05-19-2011, 02:59 AM   #3 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: TR6
 
mal.com's Avatar
 
Join Date: Apr 2010
Location: Tomakin NSW Australia
Posts: 141
Other Motorcycle: last other bike BMW R90S
Mr Pete G'day yeah the two tiny holes in the venturi are clear, the air port is clear right through. But the pilot is completely blocked a wire only goes in 1.3inches (see photo). When the motor was running unscrewing the pilot right out had no effect at all.

Do I keep probing?.

cheers

Mal
Attached Thumbnails
Blocked pilot jet?-carby-jet-001-large-.jpg  
mal.com is offline   Reply With Quote Quick reply to this message
Old 05-19-2011, 05:24 PM   #4 (permalink)
Moderator
Team Owner
Main Motorcycle: Rickman T120
 
Join Date: May 2010
Location: Victoria Australia
Posts: 4,192
Other Motorcycle: T160,TR6
You'll need to probe deeper.Start with a wire smaller than 0.016",or use the correct size drill.
If you use a #78 drill (0.016") or 0.4mm drill,you'll need to extend it.Glue it into a metal or plastic tube (WD-40 nozzle etc).
Mr.Pete is offline   Reply With Quote Quick reply to this message
Old 05-19-2011, 08:46 PM   #5 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: 71 T100R
 
Join Date: Nov 2008
Location: Nebraska, USA
Posts: 415
Quote:
Originally Posted by mal.com View Post
Do I keep probing?.
You can expose the other side of the jet to possibly see what's going on or to help in clearing it. It may be a little extreme, but what have you got to loose?

See about halfway down the page:

http://bullfire.net/Triumph/Triumph21/Triumph21.html
__________________
For only a little more, you can do it yourself!
ed_h is offline   Reply With Quote Quick reply to this message
Old 05-19-2011, 09:25 PM   #6 (permalink)
Member
Grand Prix 250
Main Motorcycle: '78 Bonneville
 
Join Date: Feb 2009
Location: Southern New Hampshire
Posts: 66
Other Motorcycle: '03 Road King
Extra Motorcycle: '79 Bonneville
Ed, its not as extreme as it sounds! On the lower lip of the intake horn are two small aluminum plugs. One of them covers the passage that is at right angles to the far side of the pilot jet. My at some point someone removed these plugs from my carbs, threaded the holes, and plugged them with a setscrew. Since the passage is at a right angle to the airbleed screw passage you can't ream it out from that side, but you can shine a light in, and tell when the jet is clear.
I think the secret is to use a guitar string. They are marked with the size, and are stiff.
nhwally is offline   Reply With Quote Quick reply to this message
Old 05-20-2011, 01:42 AM   #7 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: TR6
 
mal.com's Avatar
 
Join Date: Apr 2010
Location: Tomakin NSW Australia
Posts: 141
Other Motorcycle: last other bike BMW R90S
Thanks all. I kept at it and was just about to use another old carby body, when it cleared. As well as guitar wire, I used a set of oxy jet cleaners, which come in a range of sizes and are pretty rigid.

Any way its a one kick starter again

It took it for a run around town, a couple of new oil leaks, nothing to serious, but running very sweetly, thanks guys.

I've registered for the "Kick Start Rally" at Berry (NSW) on the June long weekend.

cheers

Mal
Attached Thumbnails
Blocked pilot jet?-carby-jet-004-large-.jpg  
mal.com is offline   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
Blocked my AI Lonerider60 Twins Technical Talk 7 10-15-2010 09:29 AM
Pilot jet blocked gfiandy T3 Sport / Touring Forum 5 04-26-2009 03:25 PM
Bailout blocked richb Biker Hang-Out 64 10-03-2008 07:28 AM
blocked air filter? Treehugger Triumph SuperSports 3 03-10-2007 09:25 PM
Blocked Drain.... Jakdaw Sprint Forum 5 07-28-2006 09:04 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 06:40 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