Next stage after can?

I fitted my LeoVince road/race exhaust a while ago and i'm well chuffed with it but was wondering where to go next. It pops a bit when letting off and goind down through the gears etc, and was wondering if its worth getting the power commander / BMC filter (JHS) and what it'll actually do. Is it just "plug and play". Also saw advert for TRE screaming, "if you have a fuel injected Suzuki you need this!" WHY???

Thanks

[BillyC]

The TRE mod, in my opinion is a bit of a con, and here is why:

On the K3's and later, the ignition timing is retarded in gears 1-5, when the throttle is less than 50%.

So... by that statement, the ignition isn't retarted when the throttle is open more than 50%.

So, if you want to eliminate your retard... open the throttle harder, or get a 1/3rd turn throttle to help this.


Also... the TRE mod tricks the bike into thinking it's in 6th gear all the time. I think this is a bit of a bodge-job personally, and I'm sure there are reasons that you don't want to trick the bike in this way, all for the sake of wanting the bike to go faster - in which case, just give it more wrist, if you hear what I'm saying.

If you've done the exhaust, the next modification should be setting up yoru suspension correctly. This will probably mean new springs in the forks, if not at least changing the preload and maybe the oil.

I agree with Billyc with the TRE mod. Knowing the technical side of things from Suzuki it aint worth having. Your far better off getting the bike remapped with a Yoshi box - most FI suzuki's dont need a power commander if your only running a filter and end can. The remapping that needs doing can be acheived through the Yoshi box which remaps the standard ECU.

The next step for you is suspension, forks and shock or maybe a full M4 system with wider bore and a small amount of head work (on the bike not you!!).

[ophic]

i've removed my TRE and not really missed it one bit. Might stick it back on just for a comparison one day. All I'm after is smoothing out throttle pick-up really - which is presumeably what the TRE advert is getting at.

If your looking at smoothing out throttle response it is always worth looking at things like having the throttle bodies balanced properly, throttle adjustment and a remap, more beneficial to the bike.

[BillyC]

Originally Posted by SV650Racer

If your looking at smoothing out throttle response it is always worth looking at things like having the throttle bodies balanced properly, throttle adjustment and a remap, more beneficial to the bike.

Agreed... Viney balanced by throttle bodies in the carpark at Riverhead. As soon as they were balanced, the engine had less work to do at idle, the RPM picked up from 1350 to 2500 RPM!

Yeah wasn't too worried about the TRE. Was wondering about re-map to make it bit more efficient etc and to stop some of the popping as fun as it is!

[ophic]

isn't the popping something to do with Suzuki's PAIR system?

I wouldnt have thought so. My race bike runs with the pair system in place and a full system and doesnt pop...and believe me the poor thing gets its botty ragged everywhere!!.

Popping can be caused by the bike running too lean or an air leak somewhere...does it leak on the join for the pipe?.

[BillyC]

Originally Posted by ophic

isn't the popping something to do with Suzuki's PAIR system?

Yes, and no...

Sarah's bike has probably been properly tuned, at the very least with a Yoshi system. This means that after the piston has fired, there is little or no unburnt fuel left to be pushed into the exhaust...

Now, your bike and my bike won't have been tuned to this efficient level!

What the PAIR system ensures, is that where there is unburnt fuel that reaches the exhaust, it is given a pulse of air to provide sufficient oxygen for it to ignite in the exhaust (the popping). This ensures that everything that comes out of your exhaust is exhaust gass, and not unburnt fuel.

The idea is to reduce emissions and be a bit cleaner to the environment. But the reality is that on the roll off, a race-canned SV sounds awesome!