sv 650 smart tre

but as yorkie chris states the advancing of the ignition supposedly richens the mixture which then reduces noise. Oops i'm getting muddled up. Ignore that quote! The tre simply allows a richer mixture in the lower gears by tricking the ecu into thinking that it's in a higher gear. An ignition advancer advances the ignition through all the gears by changing the rotor to one that has a more advanced position. Thanks again, Nick

[yorkie_chris]

Lets leave rich/lean out of it for moment

Yes, depends on the advancer. On the readily available type the rotor is the same, you just move it in relation to the crankshaft, so the ECU/ICU gets the "FIRE" signal 4 degrees earlier than it normally would.

The thinking/advertising says that the ignition is retarded in those gears (it is on 1gen too), to get through noise, it is a small amount of retard. Couple of degrees. Maybe you will gain 1bhp at certain throttle positions.


To bring other arguement into it about fuelling, some people (albeit ones who know what they're talking about), say that the 4th gear map is richer (injects more juice). This could be good or bad, it could result in over-fuelling. Or it could mean you'd map it to run good on the dyno, then it would run lean at speed.

Hi, sorry i got a bit muddled. The tre tricks the ecu into thinking its in a higher gear allowing a richer mixture for 2nd and 3rd gear. An ignition advancer is a replacement rotor you fit to advance the ignition timing, which can with certain models of bike improve low down and midrange power. From all the replies it seems the sv 650 would need to have a power commander and dyno time to gain a decent amount of power.Thanks again for your help, Nick.

[yorkie_chris]

Needs more than a power commander. Think full system, air filter, cams, bored out throttle bodies

I won't bother trying to gain extra power as i have other bikes. If i fit a race can (purely for a bit more noise) will i need to have the mixture checked or will it be okay to run, as lots of new bikes can have an aftermarket can fitted with no adverse effects. Thanks, nick.

[yorkie_chris]

Plenty SV's done lots of miles with an aftermarket can on and no changes to fuelling without any issue.

Biggest "problem" on injected seems to be popping and farting from the PAIR system. But that's just on the overrun and doesn't hurt anything.

[ophic]

Originally Posted by yorkie_chris

Plenty SV's done lots of miles with an aftermarket can on and no changes to fuelling without any issue.

Biggest "problem" on injected seems to be popping and farting from the PAIR system. But that's just on the overrun and doesn't hurt anything.

Chewy sells blanking off plates for the PAIR valve/inlet/thingummy. But most people like the pops and rumbles. However if your dealer forgets to put the PAIR tube back on, you get a bit more than pops (think shotgun).

[yorkie_chris]

You can silicon a bolt in the hole for nowt. The block off plates are good to get rid of the weight of the system entirely though

[ophic]

Originally Posted by yorkie_chris

You can silicon a bolt in the hole for nowt. The block off plates are good to get rid of the weight of the system entirely though

I'd be more likely to silicon a bolt into the dealer for making the dumbass mistake in the first place

what is the PAIR system? Is it similar to an AIS sytem on yamaha's where there is a feed from the carbs to a pump, which blows air into the downpipes to reduce emissions.