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Discussion Starter #1
Now, someone mentioned the only thing they wouldn't attempt to do themselves was balance the throttle bodies, or something very similar I can't quite remember.

Is this a Triumph dealer only job or can my local guy give it a bash with any chance of success ?

Bike's overdue a 36k and it certainly hasn't been done in the last two years.

Car failed it's MOT yesterday and cost me a small fortune to fix, so looking for ways to cut my bills, dealer service costs being one of them.
 

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Fife tiger,

I mentioned like a few others that that was one of the few things I would not do. Kit costs too much to get a return on as they only need doing every 12,000 miles. I finished a 24,000 MILE SERVICE ON MY 02 last month and took the bike with tank and panels already off to my local do anybike garage. ( DHR Racing ) Nr Dover great guy and good prices. Admit it took a couple of days as he had to invent some longer pipework to set it up but once done the bike runs great and after my first 200 mile run the milage was back to were i expect it to be. Cost was an amazing 20 quid.

Strongly recommend that you find a good local garage and let them do these sort of jobs as nearly everything else is fairly easy to do. The only other thing i don't do is grease the swing arm. too much hastle and as i said before Iv never heard of anyone on here having problems with them even after big milage.
 

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Depends whether your local guy has a set of vacuum gauges! I've balanced the carbs on an 885 Speed Triple and the throttle bodies on a 955 Sprint ST. The carb one I could use a temporary fuel tank, but the FI one I had to find a way to prop the tank alongside the bike to allow me to connect it up (fuel pump's in the tank).

It's only a relative measure - you're just setting the two 'slave' bodies to the 'master' (the one on the right, IIRC).

A tiny bit fiddly, but not a significant job. While the bike is in bits to that point, there's only 8 more screws to check the valve clearances...

John
 

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Discussion Starter #4
My guys an ex Scottish Champion Moto Crosser, him and his brother work on anything and seem to be able to find a way to do most things.

I'll pop in for a chat and see what he says to it. He'll explain, I'll nod but not understand.

It's a sound mechanic/customer relationship !!
 

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Hey guys, I just balanced my throttle bodies tonight. If you can balance carbs, you can do this.

Triumph sell a wiring and hose kit to extend the reach from the bike to the tank. It is stupidly overpriced. You don't need it! I put my bike on the centerstand right next to the work bench in my shop and put the tank on the bench. Get the bike as close as you can and the fuel and power will connect right up. You don't need to worry about connecting the drain/rollover hoses nor the fuel sender connector.

After you get the tank off, you need to remove the airbox. This is easy, remove the two bolts on the back of the box and lift it off. You will need to disconnect the breather hose (bottom rear right), electrical connector (bottom front right) and pressure hose to the computer (right middle).

After you get the airbox off, you will see the air idle hoses and valve. Unbolt the valve from its mount and move it out of the way, and disconnect the hoses. Connect the hoses from your gauges (I used a Motion Pro mercury gauge) to the ports and start the bike. You will have to hold the throttle slightly open to keep it running, but it will start with all those wires disconnected. Kinda makes you wonder if you need 'em in the first place!

To sync the throttles, remember that the #1 cylinder (left side) is non-adjustable. Sync the #2 throttle to #1 by adjusting the screw between these cylinders. Once those match, sync #3 to #1 with the other adjusting screw. You might have to repeat the process a couple of times and don't forget to blip the throttle between adjustments to let the linkage settle.

Once the gauges are matched, put it back together, you're done! Check carefully that all the connectors are married up as the tank is a bit of a PITA to pull off again. My EFI light came on for a few starts probably due to readings out of range from the disconnected sensors, but it will reset itself.

Easy! Don't let the shop rake you over the coals for this. It's way cheaper to buy or beg a gauge and do it yourself.
 

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No, you're actually changing the relationship between the butterflies so the effect is all the way up. You're measuring it just over tickover though.
 

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I set my throttles to be in sync with a few revs on the clock. They were straight across the board at 5000-7000RPM. This meant that they were very slightly off at idle. That's fine, you can't tell any difference anyway, what with that nice lumpy triple idle! Love it! Makes sense to me that you'd want them to be in perfect sync when the engine is putting out power.
 

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carb balance

Hey guys, I just balanced my throttle bodies tonight. If you can balance carbs, you can do this.

Triumph sell a wiring and hose kit to extend the reach from the bike to the tank. It is stupidly overpriced. You don't need it! I put my bike on the centerstand right next to the work bench in my shop and put the tank on the bench. Get the bike as close as you can and the fuel and power will connect right up. You don't need to worry about connecting the drain/rollover hoses nor the fuel sender connector.

After you get the tank off, you need to remove the airbox. This is easy, remove the two bolts on the back of the box and lift it off. You will need to disconnect the breather hose (bottom rear right), electrical connector (bottom front right) and pressure hose to the computer (right middle).

After you get the airbox off, you will see the air idle hoses and valve. Unbolt the valve from its mount and move it out of the way, and disconnect the hoses. Connect the hoses from your gauges (I used a Motion Pro mercury gauge) to the ports and start the bike. You will have to hold the throttle slightly open to keep it running, but it will start with all those wires disconnected. Kinda makes you wonder if you need 'em in the first place!

To sync the throttles, remember that the #1 cylinder (left side) is non-adjustable. Sync the #2 throttle to #1 by adjusting the screw between these cylinders. Once those match, sync #3 to #1 with the other adjusting screw. You might have to repeat the process a couple of times and don't forget to blip the throttle between adjustments to let the linkage settle.

Once the gauges are matched, put it back together, you're done! Check carefully that all the connectors are married up as the tank is a bit of a PITA to pull off again. My EFI light came on for a few starts probably due to readings out of range from the disconnected sensors, but it will reset itself.

Easy! Don't let the shop rake you over the coals for this. It's way cheaper to buy or beg a gauge and do it yourself.
Hi there, I just bought a 99 tiger and as im changing spark plugs and filters, i thought its a good idea to balance the carbs too. Is the method you described gona work on 99 tiger, coz I think mine fuel injected version. m?

cheers,
Algis
 

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If its a carb model you can balance them in the normal way with a set of vacume gauges.

If it is an injection model although you can balance the bodies in a similar way with a good set of guages you can not re-adjust the idle speed mechanicaly it can only be done digitaly with the triumph equipment as far as I know.

If the bike is running well then it probably does not need done anyway.
 

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Hi there, I just bought a 99 tiger and as im changing spark plugs and filters, i thought its a good idea to balance the carbs too. Is the method you described gona work on 99 tiger, coz I think mine fuel injected version. m?

cheers,
Algis
I say anytime you have the tank off, go for it, I sure will be. Once the tank is off it takes a matter of five minutes to do the sync. The 99 should be the same deal, according to my Haynes manual.

As for me, the bike was running just fine aside from vibes at speed, but I do notice that it idles much more smoothly after adjustment.
 

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Did my 24k service last weekend including throttle body sync. Idle is much improved as is throttle response. Since I did not have the Triumph digital vac tool or a mercury column, I used a UniSyn tool from my old VW Weber carb days. The UniSyn is placed over each throttle body opening individually (cap off the vac ports used with merc column ) and a floating pill measures base idle air flow by rising in a small glass tube. Get the pill to rise the same for each throttle and your there. Worked for me.
 
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