Triumphrat

Boriqua · 02-12-2009, 07:29 PM

I have read so many threads that now I am completely confused. I even read some on other pages which made it worse. Now my head is swimming

Ok ...I can ride the bike for hours no problem. I throw my wife on the bike and after we have gone some bit and the engine is good and hot .. we start to decelerate to a stop or light and loud pop and stall.

Now ..loud pop means ... Lean .. which is too much air not enough fuel. Right?

Wierd part is after it gets hotter still when I lean into a turn .. with wifey on board it will pop and stall in mid flight. It seems only to happen with the extra load.

So last time it happened I was a fair bit from home but was able to ride it home with the choke partially open ... which would mean again its lean right?

Now I can fix lean ... by adjusting the mixture screws but I need the little tool.

2007 Bonnie t100. AI removed, tors, and snorkel removed.

I just started it and listened to it idle .. it was cold so it was about 8000 or so rpms and when I unscrewed the gas cap andit broke the seal there was a slight surge in the exhaust note. Now the manual says my gas cap is supposed to ratchet .. no ratcheting here. Could it be that simple

Even if I cant fix it .. I just have to understand this stuff.
Alex

Baltobonneville · 02-12-2009, 08:31 PM

One or two riders have reported that pressure through the seat on the electronic ignition unit has caused problems. You could pursue this line of reasoning and try something to raise the seat a few mm and ensure that there is no pressure on the igniter box, then see if it still happens.

Good luck, and let us know what you find out.

ShroomyN · 02-12-2009, 09:32 PM

the only ratcheting action i know of in the gas cap is when you tighten it down. you will hear it click once you're fully tight and keep trying to tighten it. Since it sounds like the engine ran different once removed the gas cap almost sounds like you have a pinched vent hose.

CAPTDON · 02-12-2009, 10:20 PM

Or Cali pollution system (canister sealed ).A sealed unit

johnny black · 02-12-2009, 10:56 PM

Hi there,first of all your not stupid your just Bonnieville challenged,I would say you,ve got a fuel starvation problem ? your surely suffering all of the symptons,popping while shifting down is common,but the motor cutting out while 2 up and leaning into a corner is unusual,I would check your filter on the fuel tap and the vent hose,if that fails just tell your wife she can't come out for a ride cos the Bonnies playing up

J.B.

RedBird · 02-13-2009, 12:48 PM

My 2 cents: I think you are on the right track; however, whenever modifying the outlet (exhaust system) or inlet (airbox) to the motor one should change jetting. Main jets are effective for about 3/4 throttle to full throttle. The needles are effective from about 1/4 to 3/4 throttle, and the pilot circuitry is effective from about idle to 1/4 throttle. This is a greatly over-simplified explanation because there are overlaps where more than one of the systems are effective, and your throttle position is determined by vacuum with these carbs.

IMHO, one should not do the mods you have done without adjusting the pilot screws (mixture screws). Make yourself a tool and do this before your next ride! Turn them all the way in--not too tightly, and then turn them out about three turns and see how it runs them. If you have a spent 22LR cartridge or a spent 223 cartridge, you can make a temporary tool very quickly and easily.

Put your snorkle BACK in PLACE until you get your A/F a little better sorted, and then remove it as the only change so you can better determine if you want to go this route.

Tell your wife that there is nothing wrong with the bike that a few good tools won't fix, and you need to order some tools to accomplish this.

The Service Manual is ONE VERY IMPORTANT tool, IMHO.

Some '07's had fuel tank venting problems due to a faulty fuel tank cap. If it stalls again while riding, remove the cap and listen for air rushing into the tank. If you hear that, you need to get some snap-ring pliers and disassemble the cap and free up the valve OR take it to the dealer for a replacement fuel cap if it is still under warranty.

Boriqua · 02-13-2009, 02:56 PM

I fixed the feul cap. It would not ratchet on or off the bike. Pulled it apart and had cleaned the spring loaded ratching nub as it wouldnt move. It works fine after putting it back together. That might have been it since both times it happened I had started out with a filled to the brim gas tank.

Checked my vent hose since I have taken the tank off a few times and it leads to that black beer can under the bike and is attached there. I have never seen that on any other bike .. vent hose usually just terminates pointing at the floor and open so I assume its ok to disconnect it.

I just pulled the plugs and one was perfect and the other looked just a tiny little bit like it was a touch to rich but nothing to even mess with .

I had removed the snorkel, would it need rejett. I put a new air filter less than 200 miles ago. Its arizona nd the first filter was shot after 3000 miles. Should I just put the snorkle back on. Im thinking I will see if the gastnak and vent hose deal solve it ... I just purchased road side towing and assistance insurance!! Just in case.

Now the big loud pop ... Sigh ..

Gotta figure that one out
Alex

BigChiefWoody · 02-13-2009, 04:23 PM

This isn't about your bike's problem, but if my wife heard about her being mentioned in the same sentence as "extra load" there'd be some more loud popping noises!

94Tango · 02-13-2009, 04:42 PM

Quote:

Originally Posted by Boriqua

...

Checked my vent hose since I have taken the tank off a few times and it leads to that black beer can under the bike and is attached there. I have never seen that on any other bike .. vent hose usually just terminates pointing at the floor and open so I assume its ok to disconnect it.
...

Sounds like you have the EVAP system for California bikes. There are actually 2 canisters, a couple of solenoid valves and a bunch of hoses, including some that run to the intake manifolds. I don't know what would happen if you just pull the tank hose off.

You can remove the whole EVAP with no ill effects to the bike... search for instruction posted by GaryD.

Good luck!

Geimer · 02-13-2009, 05:02 PM

Boriqua,
I do not think you are stupid... If you are then I am too (which is certainly possible).
Ive noticed a very similar problem which I hardly pay attention to since mostly I ride solo.
For thousands of solo miles I experience flawless performance on my 2005 T100. Then, with my wife on the back, I do not experience a pop like you do but the bike occasionally cuts out. Let me be very specific. It is a sudden (instantaneous) loss of all power altogether that may last one second or may last 3 to 4 seconds. Sometimes it seems to happen when I hit a bump. I am quite certain it is not fuel related for four reasons, 1) Fuel starvation usually results in a bit more gradual loss of power in my experience and 2) there is nothing fuel related that changes just due to having a passenger and 3) I never have anything of this sort for thousands of solo miles. 4) on my machine the vent lines are working perfectly.
In every case so far the momentum of the machine has allowed the engine to re-start quickly while we are still moving and we ride on and maybe the next bump will make it happen again or maybe not.
I thought maybe she was resting part of her foot on the sidestand and tripping the switch. But that is quite impossible since the sidestand switch is not activated until the sidestand is fully extended. I shunted it out anyway to prevent future troubles.
I am going to look at Baltobonneville's suggestion as it seems plausible.
I will post here again if I find anything