TRE mod failed on 07

[vegacr250]

Hey fellas.. i have an 07 SV650 and did the TRE mod. I did it exactly the way i read from 2 different sites (they were very similar). Once i finished and started the bike. The FI came on and display show FI. The temp said F1 and alternated to temp. In the manual it said to take to dealer.. Yeah right. But when i pulled in the clutch the RPM did rise. Seems like it worked but no where did i read the FI light was a by-product of this mod. Have any suggestions. I know that the 07 has 2 spark-plugs per cylinder so does the TRE mod not work on 07 and newer?

Thanks Vega

[SV650Racer]

Its a waste of time anyway.

Firstly you arent removing the retard (which is very minimal anyway). You are bypassing it by making the bike run in the top gear fueling and ignition map. Top gear doesnt have the retard.

So your bike will be fueling and igniting like it should for 6th..but you will be using this in the rest of the gear positions too!. Basically top gear runs richer than the rest. Hence why the idle goes up.

Basically by doing this you are undoing what Suzuki have spent years doing by getting the fueling to adjust to what gear you are in etc.

Your better off taking it off..getting a can and getting it mapped for the bike.

[SoulKiss]

Hey fellas.. i have an 07 SV650 and did the TRE mod. I did it exactly the way i read from 2 different sites (they were very similar). Once i finished and started the bike. The FI came on and display show FI. The temp said F1 and alternated to temp. In the manual it said to take to dealer.. Yeah right. But when i pulled in the clutch the RPM did rise. Seems like it worked but no where did i read the FI light was a by-product of this mod. Have any suggestions. I know that the 07 has 2 spark-plugs per cylinder so does the TRE mod not work on 07 and newer?

Thanks Vega

I am assuming you are in the US Vega.

Twin Spark and ABS are NOT standard (or available I believe) here in the UK.

Not telling you to go away, but any mods like this are essentially for a different engine.

With the twin spark I am assuming the fuelling would be a little different to allow for the more efficient sparking.

I have heard different from what SV650Racer says, but she does know her stuff and just how much of the TRE Mod improvement is in the riders head......

[SV650Racer]

Twin spark head is standard here in the UK on the K7 models.

[SoulKiss]

Twin spark head is standard here in the UK on the K7 models.

Thanks for that - hadn't heard anyone mention it, or seen any big fuss made over it.

does it make any real difference to the bike?

[Baph]

does it make any real difference to the bike?
It'll make spark plugs more expensive. :rolleyes:

[AlanB]

Yeah, just about twice as much.

[vegacr250]

yeah i am from the us. well i was already planning to remap the bike. so i guess it is a waste. i did find anything that said that remapping the bike would do something similar or i would have not even tried it. best part is i hacked it back together because i torn one of the pins. so i probably won’t have a warranty on the bike. yay. i going to do more research n find the out if the TRE mod on 07 n newer. but as of right now it looks that it does not work.

[2mths]

I did the TRE mod because I misunderstood what it did. I sometimes get a hiccup at about ~9k when on full throttle and it's blummin annoying. I thought the TRE mod would fix that.

Having read round this a bit better now and found that:
a) it's effect is apparently at low revs
b) generally doesn't sound all that clever
I'm going to back the change out at some point. It did prove a useful exercise in learning how to get the tank off though.

[SV650Racer]

as 2mths says the TRE is often done when people think it will cure an already existing problem. Although most of the time the problem, like a hiccup at 9k could simply be cured by getting the throttle bodies balanced and the TPS adjusted.

[2mths]

TPS has been done - Throttle bodies on the 'to-do' list (would have been done if I'd bugged Baph for his carb balancer at the AR).

Plan to make the trip South to have a remap done at some point. That should fix it if it's still present.

[Baph]

TPS has been done - Throttle bodies on the 'to-do' list (would have been done if I'd bugged Baph for his carb balancer at the AR).

Next time we meet up, remind me but I can stick the vacuum gauge in the tank bag along with some circlip plyers, a screw driver & allen keys. That's all you need to get the job done.

[danf1234]

So where do these fit into the equation then? I have one of these on my bike and haven't noticed anything different.
http://cgi.ebay.co.uk/TRE-for-SV650-SV650S-SV-650-SV650-S-EFI-MODELS_W0QQitemZ300125505023QQihZ020QQcategoryZ256 23QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


Am I better off taking it off before I get my remap done on Monday?

[SV650Racer]

"Suzuki have limited the torque available in the first four gears of their fuel
injection models to make the bikes more docile. (not as fast) This is done
by retarding the ignition timing"

I have never read such ***** in all my life. What..Suzuki made the SV650 with all of its 72bhp more docile. Is this guy on drugs:smt088

If this was a retail outlet off ebay selling this trading standards i am sure would have a case.

Leave the bike be and get it remapped.

[danf1234]

Is it actaully doing anything then?

Am I really better having it off to get the bike remapped?

Is it just a placebo?

[Baph]

My understanding (and I may be barking in the wrong forest) of the TRE is that the timing is set right by Suzuki in order to get what they see as the most benefit out of the fuel.

This mod, adjusts the "timing retardation" a little (note: a little). The only way you would see a benefit here is by consitently running on higher RON fuel (eg, 99RON as opposed to 95/97RON). Then, and only then, would you see a very slight increase in performance (torque).

Factor in the time it takes to fit this, and the increased cost of the higher RON fuel, and it's not worth doing IMO.

Think about how much R&D time Suzuki put into getting spark timings sorted out in the first place. Does anyone really need to enhance their work? If they do, can this be done at the cost of this mod alone?

[SV650Racer]

Kind of right. Suzuki run a retard on the ignition between 2k and 4k in 2nd and 3rd gears for emmisions and noise tests for homologation.

The TRE bypasses the gear position sensor making the bike run in a top gear map and ignition curve no matter what gear it is in.

So, ok it "removes" the retard, BUT your bike wont be running the correct ignition and fueling for each individual gear that it is in.

Running a higher RON fuel wont make any difference as the compression of the engine hasnt changed and the ignition curve has not altered enough.

If someone told you to remove the bikes ability to run ignition and fueling for optimum running would you?.

Basically the best low end mods you can do which i am sure everyone will agree with are: change the gearing, End can and a remap.

[danf1234]

Is there any potential damage to the bike?

[SV650Racer]

Is there any potential damage to the bike?

With the mod done. Maybe not. Some people experience a bike that wont tick over properly. Oh and of course if you do it yourself pulling a wire out that shouldnt be pulled out isnt always good:D

[vegacr250]

so this is the Deal with the 07.. i tried everything again then tried 5k, 10k,15k,25k ohms and it all was a FI error. so i went into dealer mode. the error is 31. (http://www.tl1000.com/faq/fi_codes.htm (http://www.tl1000.com/faq/fi_codes.htm)). then i was tinkering w the 15 ohm in again and i found the problem. Suzuki changes something critical 4 this mod. If i have the mod in and start the bike in a gear like 1 or 2 no FI error. then 2 sec after i pop it in neutral ERROR. so my conclusion is Suzuki has something new that notices that the bike is in neutral and the trans says something different. i think this bike is no longer able to do this mod this way if at all.

[caferacer72]

I am assuming you are in the US Vega.

Twin Spark and ABS are NOT standard (or available I believe) here in the UK.

Not telling you to go away, but any mods like this are essentially for a different engine.

With the twin spark I am assuming the fuelling would be a little different to allow for the more efficient sparking.

I have heard different from what SV650Racer says, but she does know her stuff and just how much of the TRE Mod improvement is in the riders head......


Which TRE model # did you use ? The correct # for Ivan's TRE would be TRE-005K for the 2007 SV650. Hope this helps.

[caferacer72]

Which TRE model # did you use ? The correct # for Ivan's TRE would be TRE-005K for the 2007 SV650. Hope this helps.