Problems with a GSX1200Y

[peteg]

Under some misinformed advice and not knowing any better,:doh:a year back I pulled out the airbox of my 01 Suzuki GSX1200Y. Pods have been put on, main jets upsized from i believe a stock 92 to 110, and a leo Vince end can bolted on. It was running resonably well and definatly pulled a lot harder untill about 3 months ago thru not enough time (work or weather) the bike sat for 2 months. I took it out for a blast the other week, once warmed up it popped, farted, and backfired off throttle. I took it into henderson cycles but was told it was to hard to tune in its present set up:nono: and was recomended a dyno jet kit and tune... Guess what GSX1200y is not on dynojet's part list only the GSF bandit.

What can be done?
Is a bandit kit still going to work on the gsx?
Any advice much appreciated.

[rogson]

No, the Bandit has different carbs (both make and size), so jetting is not interchangeable - or even remotely similiar.

Sounds to me like you are running lean at the low end. Here are some options from easy/cheap to progressively more time-consuming/expensive:

1. Wind-out the mixture screws to at least 2 - 1/2 turns (will help but probably won't completely solve it).
2. Raise the needles using a 1mm washer under the head (the needles don't have the adjustment grooves so you need to use washers).
3. Get the dynojet kit for the GSX750Y (it's listed in Dynojet's European kits). The GSX750Y has the same carbs as the GSX1200Y, but is jetted with slightly richer needles. The needles in the dynojet kit work in the GSX1200Y and have the adjustment grooves for fine tuning.
4. Replace the stock needles with the OEM needles for the GSX750Y (can get them through a Suzuki dealer). Like the stock needles, they don't have the adjustment grooves so will need to be raised a little with washers (suggest 0.5mm).

[TripleZee Dyno]

Under some misinformed advice and not knowing any better,:doh:a year back I pulled out the airbox of my 01 Suzuki GSX1200Y. Pods have been put on, main jets upsized from i believe a stock 92 to 110, and a leo Vince end can bolted on. It was running resonably well and definatly pulled a lot harder untill about 3 months ago thru not enough time (work or weather) the bike sat for 2 months. I took it out for a blast the other week, once warmed up it popped, farted, and backfired off throttle. I took it into henderson cycles but was told it was to hard to tune in its present set up:nono: and was recomended a dyno jet kit and tune... Guess what GSX1200y is not on dynojet's part list only the GSF bandit.

What can be done?
Is a bandit kit still going to work on the gsx?
Any advice much appreciated.
Personally wouldnt bother fitting a carb kit unless you really have to. We sell FactoryPro carb kits if you really want one, but to be honest we have had pretty good results tuning modified cv setups without having to use a carb kit.
Your best bet is to find out what the problem is first and then decide what to do.
And thats where we come in!!
We can do a few base runs on the dyno to find out where and what the problems are, and suggest possible solutions. (Our brake dyno is specifically configured around tuning and diagnostics)
Give us a ring or mail if you want any more info

[vifferman]

It was running resonably well and definatly pulled a lot harder untill about 3 months ago thru not enough time (work or weather) the bike sat for 2 months.
You said it was running OK until it sat around for a couple of months without being ridden. What makes you think that it sitting around means it now needs a jet kit, whereas before it was fine?
Sounds more like there's crap in the carbs (the fuel has degraded from sitting?)
[I]IF it does need some carb work done, shimming the needles is easy enough to do, and the shims are easy to come by. I've got some that I found ina box of printer parts in my last job. By coincidence, they're exactly the right size for your average carb needles. I shimmed both my VFR750 and VTR1000's needles with them.

[slimjim]

yea i would flush out system...throw some of those carb cleaner bottles in your tank and run it out, think too sitting around has allow crap to settle in carbs

[98tls]

As above (last 2 posts)drain carbs,remove bowls,for that i would drain the tank whilst at it,maybe theres water in there.

[geoffm]

As above, it sounds like crap in the carbs and old fuel. Strip and clean.
If you want to play on the dyno, give me call. Bring beer, and be prepared to do the work...
Geoff

[peteg]

[QUOTE=vifferman;1797652]You said it was running OK until it sat around for a couple of months without being ridden. What makes you think that it sitting around means it now needs a jet kit, whereas before it was fine?

The following shit in the carb theory's would explain that its running crap after sitting, it was more that I'd been told prior to the period of no use that it really needed some dyno/jetting or cam work done for it to run smoothly.
Thanks for all advice, First ill clean out carbs then might get a dyno run to find out whats going on and where.