Tunning and mods

gpember2 · Post by **gpember2** » Wed Aug 27, 2003 1:19 pm

Hi all, Iam a new member recently aquired a mint 97 storm std form. Fitted Wolf straight through pipes, K&N filter with snorkel removed, Dynojet stage1 set as recommended by Dynojet ie both mains = 180, needle on 4th clip with orig washer under and dynojet washer on top, extra hole drilled in slide and idle mix screws 2.25 turns out.

Test ride showed from engine start cold required more choke and initial bliping of throttle (idle to 3000) produced misfireing up until fully warm.
Once on the move from cold, the ocasional spit back and stall!
No issues with anything over half throttle from cold runs a treat. When fully warm the only prob is 2nd and 3rd gear approx 3000rpm steady state produces light misfire and surging

My next step will be to increase idle turns out to = 2.75 and possibly drop needle clip to = 5.

ps bike ran fine with pipes alone fitted! probs started once K&N filter fitted which is why I purchased the dynojet kit to richen things up.

Would be greatfull if anyone has experienced simular probs or has any advice.

Also another storm rider informed me that replacing the rear longer carb intake trumpet with the same but smaller one fitted on the front cyl makes a big different in performance feel. Anyone comment on this?

Many thanks

Gary Pemberton

Midlands

thetyrant · Post by **thetyrant** » Wed Aug 27, 2003 7:57 pm

Gary,
I am in the same position as you, i fitted Micron race cans and the bike ran perfect.....month later fitted Pipercross Air filter and then i developed the same problem as you have. I have since had it on the dyno at Revolution Racing and Roger was slightly baffled by the power curve/throttle response (see below)...he recommended me to have a good look over/clean out of the carbs ( probably some muck in there) and fitting a dynojet to fine tune the fuelling. I have the dynojet kit on order and was hoping this was going to sort this problem but reading your post i guess maybe not.

If i find anything else out that may be the cause i will let you know and if you could do the same that would be great, i havent tried adjusting air screw yet so im hoping you might have some joy with that...keep me up to date.

Cheers

Ian

thetyrant · Post by **thetyrant** » Wed Aug 27, 2003 8:01 pm

Ooo forgot to attach power curve....just look at the low down hickup...nasty...bike was really leaping around on dyno when throttle first cracked open at 3k...eek

Cheers

Ian

Fireman on a Storm · Post by **Fireman on a Storm** » Wed Aug 27, 2003 9:33 pm

Don't know if this will help.
On a friends TLs he had similar running prob ( full akro and k&n)
His bike also kept going onto one cylinder at low revs.
Fuel starvation seemed part of the problem. Suzuki uk ended up looking at the bike, they got the standard air filter put back on and re tuned it,. The bike rode fine after.

At the end of the day the dealer and Suzuki thought the standard filter worked best.
It might be worth stiking the standard aire filter back in and seeing what happens.

If this is no help tell me to shut up

thetyrant · Post by **thetyrant** » Wed Aug 27, 2003 10:54 pm

Yup first thing i did...cleaned out std filter and popped it back in...bike now runs better than ever ( balanced carbs trying to cure pipercross prob this helped im sure)...put the Piper back in when i went down to Revolution for forks done so he could see it. Still not sure what it is....

Ian

gpember2 · Post by **gpember2** » Thu Aug 28, 2003 1:58 pm

Hi Ian,

Good news mate

, dropped the eclip 1 notch, #5 on the needle (richer) and turned out idle mixture screw a further 0.5 turn (2.75 from fully in).
All problems now gone, bike runs nice and sweet

Next step to get on the dyno and check power and torque against air fuel ratio, let you know when ive done it!

In answere to your question on advice on installing Dynojet kit, fairly straight forward really with the only messy bit is drilling the slids, be carefull

Good luck

Gary

thetyrant · Post by **thetyrant** » Thu Aug 28, 2003 2:19 pm

Good Stuff Gary

.
I have the kit now and it all looks simple enough,i will be fitting it at the weekend. I have spoken to Roger at Revolution about it and he recommends trying it without drilling slide first on Street bikes, so i will try that first and let you know how i get on.

Cheers

Ian

petrolhead · Post by **petrolhead** » Thu Aug 28, 2003 8:11 pm

gpember2 Posted: Wed Aug 27, 2003 1:19 pm Post subject: Tunning and mods

--------------------------------------------------------------------------------

Hi all, Iam a new member recently aquired a mint 97 storm std form. Fitted Wolf straight through pipes, K&N filter with snorkel removed, Dynojet stage1 set as recommended by Dynojet ie both mains = 180, needle on 4th clip with orig washer under and dynojet washer on top, extra hole drilled in slide and idle mix screws 2.25 turns out.

Are you sure Dynojet recommended the settings? In the manual I have they say; With a K & N filter you should set the needle to groove 5, and use a main jet that is 2 sizes larger....

I am planning to buy a stage 1 kit myself but, will probaly buy the Factory kit as it isnÂ´t necessary to drill the slides. Any experience on the forum with the factory kit?

thetyrant · Post by **thetyrant** » Sun Aug 31, 2003 10:13 pm

OK...Dynojet kit fitted with all as instructions bar slide drilling.....bike runs poorly...go to 5th groove down and drill the sildes....bike runs very well with only what feels like a slight glitsch at 3-4k...success ?....off for a test ride...pretty good...think hmmm...Revolutions not far from here....off i go and Roger luckily has time to run it up on the dyno....hmmm still not perfect but a lot better...see below...pink-cans only...green-cans and dyno jet....
Since fitted 190 mains....better again...next step try going to groove 6 without the washer( eg half a groove) and see what thats likes.....then when it feels ok.. of back to Rogers i would say and see what its like under hard dyno use.....watch this space

Cheers

Ian

SiJ · Post by **SiJ** » Mon Sep 01, 2003 10:40 am

Gents

Just to throw in my opinion regarding DJ's and filters as i've just fitted one.

Setup on my 'storm with a full Akrapovic system, dynojet and k&n is:

- 180 main on front cylinder, 190 main on rear.

- 1 notch lower from needle position stated in dynojet guidance notes (position 5 from top?)

- Drilled slides

- 2.25 turns out from seated on pilot screw.

- increase idle speed to 1100rpm to help stop occasional stalling when hot.

Bike runs like a dream and is putting out 118bhp.

Hope this helps

thetyrant · Post by **thetyrant** » Mon Sep 01, 2003 12:34 pm

118bhp....jeez that akropovic is working miracles D)..full Moriwaki stage 1 kit with pistons, head work, cams and pipes only give 122bhp ish...

I have the Pipercross filter which has a lot more flow than the K&N which is what my problem is i believe, after seing that the K&N is just same as std filter but with k&n filter section i can now understand why my Pipercross is flowing so much air....its just one big foam filter with no plastic surround at all

..just makes it a bit of a bitch to setup spot on...getting there now though...

Cheers

Ian

blackstorm · Post by **blackstorm** » Mon Sep 01, 2003 8:24 pm

Sij
Is that 118 bhp at the rear wheel, Ive got the same set up full Ackrapovic, Dyno jet and K&N filter with the addition of a super chips unit but my 99 storm still only makes 110 ish at the rear wheel.

SiJ · Post by **SiJ** » Tue Sep 02, 2003 8:29 am

Yeah 118 rear wheel bhp.

The only other thing was i've had the heads gas flowed as for some reason mine were casted especially badly and had a lot of rough on them.

Bike was putting out about 112bhp before i had this done so yours sounds to be about the same.

Only other reason could be the dyno used may be reading a little high.