I've done a search to see if I can find my answer but it doesn't seem to show a good enough picture of what i'm looking for. I have been reading through the manual but it doesn't seem to show the same type of drawing as what my carb has for hoses.

A little background on the bike first. I bought the bike off a guy who said he always had a hard time starting the bike after he had the engine all apart. As I go along I find more and more things that would lead me to not be surprised why it won't start easily if it even starts at all. The first thing I did was replace the battery, the one that was in there wouldn't even charge. Next on the list was to put new plugs in, I always do this for any new vehicle I get. Now I'm into the carb and this is where I need the help at. The diagrams in the manual don't help me that much so I'm hoping someone on here can help. I haven't had the bike running since the day I purchased it, luckily its winter and I have lots of time to tinker away at it.

The 2 black hoses circled were plugged off with screws when I got the bike, and going by the manual I am assuming these are the vacuum hoses? If so should they be T'd together and routed back to the back of the fuel petcock? In the manual it only shows 1 vacuum line routing into a nipple on the side of the carb, can I assume there is a vacuum nipple on both carbs and they just showed the 1?



Next is the air vent hose T, it is circled. Should this be just vented to atmosphere?



and last but not least, does anyone have any of the black top caps laying around they want to get rid of? Both of mine are cracked and I can't see this helping the situation at all.



My next step is to check the timing is correct because I get the feeling it won't be anywheres near right lol

Thanks in advance for any help

Andrew

Vacuum fitting to petcock is that one like an L its the smaller size hose.
The T fitting on the top of carbs gets a hose on it which goes to the back toward the back of airbox, but its a vent hose, that hose has to remain open, and unclogged, else the bike will not have gas flow it will vacuum lock as fuel cannot leave the bowl.
The other one ... I dunno what its connected to on the carb, you have not shown that in your pics.
Cool.
Buddha.

Buddha, thank you for the info so far.

So just to make sure we're on the same track. The open T I have circled in the second picture should be left to vent to atmosphere, I'll put a hose on it and route it towards the airbox to make sure its clear.

The thing I am still unsure of is whether or not there should only be 1 vacuum line? In the first picture you say the L shaped line is the vacuum line that goes to the petcock? I would have thought there should be a vacuum line for each carb that would T together and then go to the petcock? Any advice is greatly appreciated.


Andrew

Only one of the vacuum ports is used on the '94, the other is capped. Those cracked caps could be trouble. Make sure the little o-ring under the cap (seals the capped port on top) isn't missing.

In this thread (scroll down):

http://gstwins.com/gsboard/index.php?topic=45689.0

both hoses in your first pic are vacuum lines, connected with another T.  depends on year.

Right gearman and 2 X right - both your caps are DOA kiddo. I have some - or not ... I have to see. But you definetly need the caps - both of them.
Cool.
Buddha.

Quote from: gearman on January 02, 2009, 06:59:59 PM
Only one of the vacuum ports is used on the '94, the other is capped. Those cracked caps could be trouble. Make sure the little o-ring under the cap (seals the capped port on top) isn't missing.

Mine is a 1996 so I imagine it would only use 1 vacuum port and cap the other as well, since they are very similar if not the same. I am definitely going to replace the top caps on the carbs. I think I may have found a parts bike about an hour away that I'm going to check on today, it would make life much easier to find parts for.

Thanks for the help so far

Andrew