Well my bike has started to die anytime I let it idle. It happens instantly so if I'm approaching a stoplight and pull in the clutch it just dies. Took the tank off and noticed the boots look pretty crumbly and the carbs kinda hang down. If I tip them back up and push into the block a little it seems to remedy the problem.

Anyways, the bike/engine is 1990 but the carbs themselves are from a 2004 apparently. Was looking to just pick up new boots from BikeBandit, but the part number is different for 1990 and 2004, and the 2004 is also 8 dollars more. Is the difference how it attaches to the head, or the carbs? I would imagine there has to be some difference otherwise everyone with a 2004 would still just buy the 1990 boots. Also, do I need to get the o-ring as well?

Thanks!
Wright

The newer ones are slightly different size. I had to replace them as well, and it took me 2 tries to get the right ones. If you do end up with newer ones you will just have to tighten the carbs on really well. I would definitely recommend replacing the o ring as well, unless the ones you have a relatively new and still nice and fresh.

Quote from: Soloratov on July 29, 2012, 08:24:53 PM
The newer ones are slightly different size. I had to replace them as well, and it took me 2 tries to get the right ones. If you do end up with newer ones you will just have to tighten the carbs on really well. I would definitely recommend replacing the o ring as well, unless the ones you have a relatively new and still nice and fresh.

Thanks for the reply. So you're saying the '04 boots would fit the carbs good, but need to be tightened onto the head really well? Would the old boots take the new carbs okay, they're cheaper so I'd really like to be able to get away with that. 

If you can find the old ones they fit 89-01. So yeah. The new ones are just, very slightly larger on the CARB side. They are all the same as far as attaching to the motor. Just the rubber section is kinda weird. So your clamp ring has to be snugged up a bit more.

http://gstwins.com/gsboard/index.php?topic=58384

#5176

Quote from: Soloratov on July 29, 2012, 08:41:08 PM
If you can find the old ones they fit 89-01. So yeah. The new ones are just, very slightly larger on the CARB side. They are all the same as far as attaching to the motor. Just the rubber section is kinda weird. So your clamp ring has to be snugged up a bit more.

Having both new and old carbs and engine manifolds in hand....  I have to correct you here.

The engine manifolds mount to the engine the same.
They are the same diameter. They are the same length. They take the same o-ring. The clamps are the same.

What is different is the depth of the grove that the carbs fit in.

The older carbs will not stay in the newer carb boots because the groove is shallower. It would appear that newer carbs would fit into older carbs.

On the left is the newer carb manifold which is identified with "01D4" on it. The right is the older carb manifold and is identified with "01d0" on it.

if it were me, id get the proper boots for the proper carbs. afro-ingenuity will only get you so far. id rather you not be stranded. if you must carry a spare set of boots along with tool kit, so if this does happen you cna replace them while on the road, and have htat piece of mind you need

#5178

I tested and old and new manifolds fit on newer carbs.
Older boots are the only ones that fit the older carbs.

If in doubt, get carb boots for 89-00.

If you know your carbs are 2004, then either will work. If you are unsure what year your carbs are, post a picture.

I honestly am not sure of all the specifics of a 2001-2002 carb. I do not have a set but know there were some changes as 2001-2002 is kind of a "bastard" year in my opinion as it is sort of 89-00 and part 2004+. Not putting it down, just describing the technicals of it. I'd love a 2001-2002 set of carbs in the West Seattle Bike Cave collection. We have about everything else on hand.

Actually, the next bike build will use 2001 frame and engine with 2004+ carbs and 2006+ wiring harness. Remaining parts will be assorted from 1989-2012.

FYI: 2004+ carbs on the left. 89-00 carbs on the right.

Quote from: adidasguy on July 29, 2012, 11:17:51 PM
#5178

I tested and old and new manifolds fit on newer carbs.
Older boots are the only ones that fit the older carbs.

If in doubt, get carb boots for 89-00.

If you know your carbs are 2004, then either will work. If you are unsure what year your carbs are, post a picture.

I honestly am not sure of all the specifics of a 2001-2002 carb. I do not have a set but know there were some changes as 2001-2002 is kind of a "bastard" year in my opinion as it is sort of 89-00 and part 2004+. Not putting it down, just describing the technicals of it. I'd love a 2001-2002 set of carbs in the West Seattle Bike Cave collection. We have about everything else on hand.

Actually, the next bike build will use 2001 frame and engine with 2004+ carbs and 2006+ wiring harness. Remaining parts will be assorted from 1989-2012.

FYI: 2004+ carbs on the left. 89-00 carbs on the right.

the newer carbs have a 3 jet/3 circuit. aka low mid and high. externally idk they seem about the same. @ mmi we learned carb adjustment on the trusty gs. more forgiving than anybody here.

Quote from: Wrightboy on July 29, 2012, 07:52:05 PM
Well... and the carbs kinda hang down. If I tip them back up and push into the block a little it seems to remedy the problem.



Thanks!
Wright

Do you have carb mod like pod etc where the only attachment of the carbs to the bike is via the rubber boots. ? If so, that's a lot of weight for those two clamps and little pieces of rubber to support, 'specially joltin' over potholes/rail tracks etc.

Adidas - That works. Been a little while since I messed with them. I knew something was off about them when I tried them. Pictures help!

I do just have the pods for the air filters, bought it like that. Does the airbox provide some form of support? Might have to head over to the sale section and see if I can buy one...I really don't care about the pods, they're just there.

And thanks for the pics adidas. Looking at those I definitely have the '04 carbs, they have those little white caps with the 2 hose spots on each(though only one is real), they were left open when I got it but when I had posted with them earlier I think buddha had recommended I buy some rubber caps and close them off so I did (Though they're pretty dried/cracked and about to fall off now). And what do the 2001-2002 carbs look like?

I've never done any sort of tweaks to make the '04's work...though I did put a jet kit in from buddha. Is there something there that could potentially be causing me problems?

Is there any reason to not just get the old ones still? Being tighter would they provide a better seal? Or should I just spend the extra and get the '04s.

Thanks!
Wright