sv650 powerband question

I been riding my sv650 for a few years now. since taking it off the road for a few months due to no insurance, and to fit it up i am finding it lacks alot of power. just taken it out for a spin and finding it doesnt like 2-3.5 revs. but after that around 4.5 it comes to life until around 8-9.

from my memory and experience of having owned two sv's I thought they are supposed to be really perky from the moment you touch the accelerator (idling around 1.5) to give easy over taking in slow traffic as being able to roll the power straight on from 2.5 revs approx.

prior to fixing the bike up there was misfires. since moving the plugs and ensuring a good connection between htc leads plugs. the rear cylinder fires alot better as the rear exhaust pipe used to be cold compared to that of the front. I also now got original exhaust on hoping that it was the bike is optimized for. But still feel the sv650 lacks power.

i have put fuel cleaner in the tank before in two consecutive fuel stops and that didnt help. am i just being stupid because i want more power or should i have checked something else, it just seems to not wan to run smoothly under 3.5 revs and i rev and slip the clutch alot more when moving off/ over taking/ slow maneuvers as I am affaid it will stall on me.

Its funny you should mention this as other the past week I've felt my bike was down on power. It recently got a new Beowulf exhaust and I am just wondering if I am now used to the bike

[Mark_h]

Could be out of balance. You don't say if it's a carbed or injected bike but either way if the carbs/TBs are miles out it all gets lumpy and horrible at low revs. If the tickover sounds uneven then they may be out of sync. Fairly straightforward to sync if you've got access to a set of gauges.

Originally Posted by Mark_h

Could be out of balance. You don't say if it's a carbed or injected bike but either way if the carbs/TBs are miles out it all gets lumpy and horrible at low revs. If the tickover sounds uneven then they may be out of sync. Fairly straightforward to sync if you've got access to a set of gauges.

Agree with this. Also might be worth checking and adjusting the TPS. Might sort out some of the lumpyness at low revs.

It's a 2003 injected model. I'll try doing balance again with gauges but I been using mercury ones and bubbles get in them easier. Are digital ones better?

[Fallout]

double post

[Fallout]

From a totally non tech point of view, my being used to the SV power snuck in expectedly. One day I just thought "I thought this was faster?", so it COULD be that. The same thing happened with my Skyline. One day I dropped it off for a service, picked it up the next day with that "heheheh. I'm gonna rag it home!" feeling and felt disappointed with the power all of a sudden ... so much so I though they'd nicked my turbos and swapped them for older/small ones. In fact, I feel the same with the gsxr750 right now, and only had it about 6 months. It doesnt feel slow, but the fear has gone and it's made it feel slower than my memories of pooing my pants when I first rode one.

Perhaps its the high speed memories that stay with us and we draw on for our expectation. Anyway, could be mechanical but could be the subliminal push towards a bigger bike.

[yorkie_chris]

New plugs, balance throttle bodies, set the TPS, check air filter. Etc.

I don't like digital gauges, mercury sticks are good but a bit finicky, I like carbtunes.


Don't bother with fuel cleaner it's a waste of time.