Engine Stumble and Roughness Gone - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 7 Old 05-20-2007, 07:06 PM Thread Starter
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Engine Stumble and Roughness Gone

Well I decided to follow the advice and remove the secondary plates and T the two vacuum lines between cylinders. You know how sometimes you read about all these modifications and most of them result in a minor or no noticable change. This was not one those. 90% of the stumble and roughness at 3500rpm is gone. The bike not pulls smoothly, even when doing a 4th gear roll on from 1500rpm. You can cruise all day at 3500 without any surging. Based on the great advice I also ran extension lines from the vacuum ports to make balancing the trottle bodies a very easy task. The job took about 2 1/2 hours, with most of that spent drilling out (very carefully) a rounded screw in the secondary plate. Great advice, I might just keep this bike after all.
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post #2 of 7 Old 05-20-2007, 11:55 PM
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Doesnt state in your profile, so I assume you are talking about a 1000?

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post #3 of 7 Old 05-21-2007, 07:18 AM
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Originally Posted by 2WHEELS2GO View Post
...and T the two vacuum lines between cylinders...
Really? Would you have a link to the thread about this?

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post #4 of 7 Old 05-23-2007, 06:57 PM Thread Starter
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Yes, this was on a 07 DL1000. I don't recall the posting as I just write down notes (or print) items of interest when see them. This way whenever I have a little free time I can look through the list to see what I'm in the mood for. I was on cruisers for a number of years and then went to a Goldwing when they came out with the 1800. I was riding alot back then, when life got busy I wanted a little more sport (son rides a blackbird). Tried an ST1300 but was not happy with motor design and changed to the DL1000. Added risers, goldwing footpegs and cut down an old goldwing windshield to end the buffeting problem. Looking at designing a stereo and speaker package in a tank bag. Havn't decided on the seat yet, I've got an yamaha royal star seat that I may mold into the seat pan.
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post #5 of 7 Old 05-23-2007, 07:36 PM
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Originally Posted by Heavy View Post
Really? Would you have a link to the thread about this?
Not positive, but this might be the link over on VSRI. I noticed recently that it talked about interconnecting the PAIR and IAPS lines.

http://vstrom.info/faq/index.php?act...=67&artlang=en

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post #6 of 7 Old 05-23-2007, 07:50 PM
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Nice find. I think I'll try it. Another easy, if-it-works-I-keep-it-if-it-doesn't-work-I-change-it-back, mod.

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post #7 of 7 Old 05-24-2007, 01:29 AM
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If you want to go after the last 10% try these.

1) TBS Sync
2) NGK iridium spark no. NGK CR8EIX.
3) adjust chain
4) check throttle cable adjustment
5) 16 tooth sproket
6) remap

This is about as far as you can go without getting into the aftermarket exhaust and programs.
I'm almost there with mine, I haven't tried a 16 tooth but think this would help do to the stock gearing being so tall and have read good reviews in this regard, downside is you'll need a speedo healer $
Personily I'd rather put money into the suspension then the exhaust and chips.
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