Sub 5000 rpm unresponsiveness

[T-Bird]

Hi all,

I just bought a second hand (year 2000) Storm last week and love it so far. Lovely and grunty after my old ZX6

However, all the mags say it has linear, uneventful power delivery from tickover. I am not finding this - the bike seems slightly unresponsive below 5,000 rpm. Is this right? It is occasionally backfiring when slowing down and gear changing, but it seems (from reading some other threads)this is possibly quite normal.

Many thanks for any advice.

[T-Bird]

ps. the bike is standard, but the previous owner used Remus race cans for a while. Apparently the jetting, etc has never been changed from standard.

[CaperJ]

Mine also below 5000 is slightly unresponsive definitely 5000 and above has a better response but this seems normal and if when slowing down and I am gearing down when I pull in the clutch I have a tendancy to snap the throttle before letting it out and when its out and the gears slow the bike down I get a bit of backfire not always but sometime. I have found this normal on all my Hondas.

[Vstormer]

Hi,
Came from Bandit 12 last year and thought the storm was sluggish until I rode with another B12 and realised that I was leaving the thing for dead. 4 to 2 is good pulling power if you try and forget the different sounds, I think you are most likely riding by ear maybe. They ARE pulling all the way.

[T-Bird]

Cheers for the info guys.

Might still end up trying a 15 tooth front sprocket at some point though, as am not that interested in top end performance.

[Vstormer]

Do the 15T best mod available.

[blackstorm]

Ditto

[andy c]

If you do the 15T is there enough adjustment on the chain or are you into a new chain as well

Andy

[Stormin Ben]

Gearing: I went up 2 teeth at the rear coz it shortens the wheelbase and makes it turn better

Unresponsiveness: Fitted a pipercross air filter after talking to Roger at Revolution and it's made a HUGE difference. Before it was sluggish and lumpy if you opened up under 5k but now it just picks up its skirts and buggers off from 2k upwards

Ben

[Vstormer]

Std chain length OK so long as the chain is in good nick.

[Fluffy]

I have the same as Ben.. a 43 tooth rear, like Ben says it shortens the wheelbase and is kind of like going for a 15 1/4 tooth front :-)

Not quite the same drop as a 15 tooth, bear in mind the speedo will be out pretty badly after the cog swap so sticking a Sigma push bike computer on is a good option. DONT pay mandp or whoevers prices for them, they are cheaper at mountain bike shops like settle cycles http://www.settlecycles.co.uk

Sigma BC's are good to 183MPH

Cya

Fluffy

[VTR Fritz]

hi from frankfurt,

great page with an interesting board !

it seems the 43 tooth rear is the most spread & favourite mod to reach a better responsiveness...
additionally an air filter mod will help. I equipped my airbox with a special filter and it´s not a K&N... a guy in germany Dannermotorrad did a lot of tests with a selfmade modification of the genuine filter to increase the airflow. he´s using NoToil filter material so the engine can breathe much better. that requires also a minor mod of the carburetor. in combination with open cans like BOS or LeoVince it gives ~5-8HP and clear improvenemt of responsiveness at 4000rpm to 9500rpm.
I did all these mods in combination with LeoVince EVOII cans and I must say my VTR became a different bike, but now the rear tire is suffering hardly ;)

greetings
Fritz

PS: sorry for my poor english.... I work on it