Bogging in first, little help please | GTAMotorcycle.com

Bogging in first, little help please

professor

professor

Well-known member
Morning guys.
Little history:
Bought my 2001 gsxr srad last year at the end of the season. Guy was great who sold it. Told me very little detail about the bike.
He mentioned an issue which occurs in warmer weather. And of course I forgot about it as I bought the bike last september so all my riding has been in the cold.

So here is the issue:
If I'm at a light from a dead stop I roll onto the throttle I get no response for a second of so then all of a sudden it starts to spool an cracks open.
Yeaterday was 18 outside so I noticed it for the first time. Day before was 9 out and second I touched the throttle the response was immediate and I was gone.
Again only in warm weather. Nice fresh premium gas. Has a new air filter. So I can scratch those off the list. If that would have anything to do with it.
Now I was more concerned about the issue at hand that I didn't pay attn to any hwy or street driving. But nothing really became obvious as the bike was in movement at a higher rpm.

Hope that makes sense guys. Any help would be great.
 
That's one of the years that still had a "fast idle" cable along with the fuel injection, right? Does everything else work properly? Because you've eliminated the fuel and the air source, I would start considering there is some blockage in the idle fuel circuits or a lot of residue built up in the throttle bores. Both would require disassembly and cleanup, but maybe running some Seafoam or Techron through it might help. Kinda tough to diagnose sitting here in front of my computer, but that would be my guess. Let us know what happens.
 
It's actually still carb. Think it was the following year try went to fuel injection. If that makes a difference.
I also forgot to note above that he said he talked with his mechanic before his wife made him sell, and he said it may have to be "jetted"
now would something like this make sense to you guys?
 
not sure if seafoam will help because lets assume thr idle jets were blocked and that he had to roll the throttle until his secondary jets came into play. then how do you explain it only hapening in hot weather? a blocked jet is a blocked jet.

maybe his bike is to lean in the idle jets?

i am no mechanic by any means and there is guys that know way more then me so lets wait to hear their response.
 
OK so now it makes more sense. Aftermarket exhaust? Different air filter? If so, did he put a Dynojet kit in the carbs? If components have changed and he did not compensate with a kit, then yes, it should be "jetted" as he said. There's really a lot more to it than that, the kit will tell you to drill larger holes in the top of the slides to allow the carbs to react faster, and maybe different idle jets and/or main jets and needles to alter the transition from idle circuit to main jet, right where you're getting the bog. You need to find someone that knows this bike well, he can probably get it right fairly inexpensively. If you leave the choke on a bit does it help?
 
skapan said:
OK so now it makes more sense. Aftermarket exhaust? Different air filter? If so, did he put a Dynojet kit in the carbs? If components have changed and he did not compensate with a kit, then yes, it should be "jetted" as he said. There's really a lot more to it than that, the kit will tell you to drill larger holes in the top of the slides to allow the carbs to react faster, and maybe different idle jets and/or main jets and needles to alter the transition from idle circuit to main jet, right where you're getting the bog. You need to find someone that knows this bike well, he can probably get it right fairly inexpensively. If you leave the choke on a bit does it help?
Click to expand...


Yes there is a yoshi exhaust. As for what he did and or didn't do I'm not too sure.
But I'm glad you feel a little more confident with the new info. I appreciate yyour time. Think it's time to find a mechanic. I'll take a look in the review section and see what I can find.
Thanks again guys.
 
It sounds like the OP needs to tell us what he really has - and more to the point, whether it is carb or EFI.

I was under the impression that SRAD GSXR's were carb for the first two years (1996 and 1997) and then switched to EFI while keeping the same body style for a couple more years, but my memory could be wrong. (edit: Wiki agrees)

In any case, it sounds like the fuel delivery has not been matched to modifications made to the bike. Or, the TPS is bad.
 
1996-1997- Gsxr 750 carbs
1997-2000- Gsxr 600 carbs
1998-2000- Gsxr 750 - FI
 
So it's a 600, we were all thinking it was a 750 I guess. I know I was.
 
skapan said:
So it's a 600, we were all thinking it was a 750 I guess. I know I was.
Click to expand...
I'd say I was testing you but I already played that card once !
Sorry yes a 600. I was writing and trying to get the symptoms down and forgot some basic yet fairly important info ;).

I will try the seafoam regardless. It's older, do a good system clean wouldn't hurt.
Dirty jets? Dirty carb? Combined with warm air be some of the issue? I'll have to see.
I will do that this weekend and run it through. And I believe Tuesday is warmer weather and hopefully it helps.
Every shop is swamped rite now and want to charge and arm and a leg to look at it. Let alone work on it.
 
So I have added a cleaner to the tank. I ran it today. I'll get through the tank and see if it helps. Now that I have paid more ATTN to it, I have noticed it does the above issue in the colder weather. Now not nearly as severe as in warm weather. Now I tried to put my choke to about half. Didn't notice much of a difference. With that being said, being as its 20 tomorrow I will see if that makes a difference.
 
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