Triumphrat

webonnielad

Hi Guys

First of all nice new site.

I've been riding my bike now for 2000 miles; trouble free; with the mods posted in my signature.

I'd been riding for about 45 minutes and I started to develop a small rapid misfire. I carried on riding and it gradually got worse. I had to stop on the side of the highway for a call of nature.
When I returned to the bike she was incredibley hard to start and would only run on one side under 3000 rpm in any gear. So I limped her home.

Sure enough after removing the plugs they were all sooted up, so I replaced them and she fired up ok for about 3 minutes and the problem returned.

Next removed carb tops and checked the needles and shims etc which appeared fine. Drained the carbs, removed the bowls again everything looked absolutely fine.

With the gas off carbs refitted, plugs removed turned her over a few times just to clear out any excess gas and check for compression, all fine.

Removed the air filter and as I started undoing the bottom bolt on the velocity stack, gas started pouring out.
It appeared I had a puddle of gas in my airbox.

The airfilters out for cleaning now, but while i wait for it to dry overnight before refitting it.

Has anyone had this happen to them?
Any ideas on a possible cause?

I'm hoping that since I've taken everything apart and put it back together, it was just some crud in the fuel sysytem.

But I'd like some advice from someone who's good at this sort of problem , as I found no visible evidence of the cause.

Cheers guys.

Jon (UK)

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790cc 2003 T100 Bonneville. 18T Front Sprocket, AI Removed, 125 Mains, 40 Pilots, Thruxton Needles, 1 Shim,3mm Air Hole, Mixture screws 3 1/4 turns out left carb, 3 turns out right carb, Unifilter, NH Belmouth, NH Classic Togas with no mutes inserted, Stock Ignitor Unit. Hagon 320mm rear shocks & progressive fork springs. Last measured. 61.60 hp, , Max torque 48.40 in 5th gear at the rear wheel at 7200 rpm, 105 mph in 5th at 6500 rpm.

Stealth

Sounds like a float hanging up to me.

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Put your arms and legs inside the ride at all times!

Stealth

125 main /42 pilot /Predators /K&N air/Mobil1 oil & filter

badrufus

I agree that the most likely culprit sounds like a stuck float valve. Before taking the carbs apart to get to the float valves, try running through a tank of good gas with Seafoam added. I would also suggest washing and reoiling the filters. Right now, even dry, they are flammable. You may need to take them out and wash/reoil again once you get this sorted.

RedBird

You don't say what year, etc. info on the bike. If the carb vent gets blocked, the carbs will flood--much worse than what you have experienced, so the vent is not totally blocked; however, it could be partially blocked. For the bikes with the canister system for reducing emissions, the problem usually arises when someone removes the canister system and plugs the vent hose that ran to the canister. For the bikes without the canister system, the vent is just a "T" connection between the carbs with the open part of the "T" facing downward--at least that is what I remember on my '03 T-100.

Before I messed too much with the floats, etc., I would try to find what is causing the problem...venting for the carbs would be my first check.

Good luck.

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Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.

webonnielad

Thanks guys

I keep reading about this Sea Foam miracle cure on this site, but it looks like it's impossible to get in the UK and I haven't found a supplier who ships to the UK.
Can anyone help me get some?
Is the Same product available in the UK under a different name?
Is Redex Carb Cleaner the same thing?

The answer to one or all of the above questions will be gratefully recieved.

Jon (UK)

__________________
790cc 2003 T100 Bonneville. 18T Front Sprocket, AI Removed, 125 Mains, 40 Pilots, Thruxton Needles, 1 Shim,3mm Air Hole, Mixture screws 3 1/4 turns out left carb, 3 turns out right carb, Unifilter, NH Belmouth, NH Classic Togas with no mutes inserted, Stock Ignitor Unit. Hagon 320mm rear shocks & progressive fork springs. Last measured. 61.60 hp, , Max torque 48.40 in 5th gear at the rear wheel at 7200 rpm, 105 mph in 5th at 6500 rpm.

webonnielad

Hey redbird thanks for that, that was something i didn't know so didn't check.
My bike is a 2003 790cc T100.
Can I unblock it without pulling the carbs?

Jon (UK)

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790cc 2003 T100 Bonneville. 18T Front Sprocket, AI Removed, 125 Mains, 40 Pilots, Thruxton Needles, 1 Shim,3mm Air Hole, Mixture screws 3 1/4 turns out left carb, 3 turns out right carb, Unifilter, NH Belmouth, NH Classic Togas with no mutes inserted, Stock Ignitor Unit. Hagon 320mm rear shocks & progressive fork springs. Last measured. 61.60 hp, , Max torque 48.40 in 5th gear at the rear wheel at 7200 rpm, 105 mph in 5th at 6500 rpm.

badrufus

Sorry--didn't realize Seafoam was unavailable. It is simply a good carburetor cleaner. Get the best carb cleaner you can find for four-stroke engines. You add it to the gasoline in the tank. Check out Redbird's suggestion re the vent hose first.

RedBird

Jon,

Look between the carbs--between the fuel hose and the throttle cables--you will see a tube going from one carb to the other with a "T" in the tube with the open end of the "T" pointing downward. This is the vent for the carb bowls. If it were me, I would simply install a hose on the "T" and use my mouth to check and see if it is open...it would probably be a good idea to remove the bowl (float chamber is the proper term I believe) on one carb so you can easily see if the vent is open by sucking and/or blowing on the hose you connected to the "T".

If a bike is parked outside where I live, the wasp type critters find every hole to use for depositing their eggs encased in mud.

Good luck

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Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.

RedBird

Jon,

Since your bike is a 2003, the odds are probably with your problems being due to a float sticking due to fuel problems. How many total miles are on your bike. Was it ridden very little by a previous owner?

Marvel Mystery Oil (MMO) may be available across the pond. I doubt that there is anything better for cleaning out gum and sludge in your fuel system. My father started using MMO in the 1920"s, and I started using it in the late 1950's. The oil company my father worked for bought MMO in 55 gallon drums to use on their oil field engines to keep them running smoothly.

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Larry
2003 T-100 (790cc), NARK, NH Togas, 8100 rpm rev limiter, 158 main jets, 42 pilot jets (less than 1 turn out on pilot screws), stock needles--no shims. 13 A/F ratio from 1100 rpm to 4000 rpm; 12 A/F ratio from 4000 rpm to 6000 rpm; 13 A/F from 6000 rpm to 8100 rpm.:D
2007 Tiger 1050--White:D--SW-Motech crashbars, Skidmarx rear hugger/chain guard, Calsci +7 windscreen.

webonnielad

In the end i flushed all of the gas out of the carbs , airbox and engine.
Put it all back together, turned the gas off and did a leak test overnight (you probably realize that the OEM gas tap is not watertight).

This morning I went out to inspect the carbs and low and behold there was a seapage around the right hand mixture screw.

I pulled out the screw and the washer was seated on top of the O ring, when it should have been the other way around.

That's why it ran for nearly 2000 miles before becoming a problem, it just allowed enough crud to build up in the pilot system over time.

Just so you know this happened when i fitted my New Bonneville mixture screws. The Thumb screw type.

So don't be a fool like me, if you buy these make sure you do it right, cause otherwise like me , it'll creep up and bite you in the a***.

By the way the venting tube thing worked reall well, I must have blown about a 1/2 pint of gas outta my intake rubbers.
she has a good helping of redex carb cleaning treatment in her gas.

Jon (UK)

__________________
790cc 2003 T100 Bonneville. 18T Front Sprocket, AI Removed, 125 Mains, 40 Pilots, Thruxton Needles, 1 Shim,3mm Air Hole, Mixture screws 3 1/4 turns out left carb, 3 turns out right carb, Unifilter, NH Belmouth, NH Classic Togas with no mutes inserted, Stock Ignitor Unit. Hagon 320mm rear shocks & progressive fork springs. Last measured. 61.60 hp, , Max torque 48.40 in 5th gear at the rear wheel at 7200 rpm, 105 mph in 5th at 6500 rpm.