300cc Kit

[sqwert]

I have Tako's 82mm kit installed and it is awesome. ECU adapted in about 15 miles of backroad curves and hills. No backfires. No retune needed. ECU has bigger problems when I have to run E10 when no uncontaminated gasoline is available. Mobil and Shell premiums have more octane and little or no ethanol--the ECU loves good fuel and runs much better on the good stuff. More of a difference with fuel quality than changing engine displacement.

[NzBrakelathes]

https://www.magnumtuning.com/en/deta...-chip/zongshen

[Juanro]

Originally Posted by NzBrakelathes

https://www.magnumtuning.com/en/deta...-chip/zongshen

What's exactly that… an all around enrichment by mangling de intake temperature and O2 sensor? hmmm

[sqwert]

Originally Posted by Juanro

What's exactly that… an all around enrichment by mangling de intake temperature and O2 sensor? hmmm

What? Everybody doesn't already know all these pops on deceleration are from a lean mixture required by EPA? Really! That's all it is. Harleys are really bad about it. The dealers charge a small fortune to set the EFI where it runs best. Not exactly legal in the U. S. of A., either.

The chip below is really expensive.

[NzBrakelathes]

Originally Posted by sqwert

What? Everybody doesn't already know all these pops on deceleration are from a lean mixture required by EPA? Really! That's all it is. Harleys are really bad about it. The dealers charge a small fortune to set the EFI where it runs best. Not exactly legal in the U. S. of A., either.

The chip below is really expensive.

Pop n crackels are lean - I thought a pop was a bit too rich and small backfire.

Mine only here n there does it - I suspect O2 slow to act or the fact I have an older bike with older version injector.
I don't see or feel the need to fix or chase it as it is just minor and I think ECU reset and correct cleaning of stepper area reduces the pop etc.

Not a big concern to me at all

[NzBrakelathes]

Remember only 6000rpm and below does the ECU look at all the sensors and self learn/adj to conditions etc.

Above 6000 rpm it runs from the map and only looks at throttle position and MAYBE air temp (not O2 sensor which is narrow band) but even air temp is a guide nothing too much considered by the ECU from what I understand from the Benelli mechanic in China (Benelli uses same system)

[Juanro]

Originally Posted by sqwert

What? Everybody doesn't already know all these pops on deceleration are from a lean mixture required by EPA?

I'm in the process of tunning a universal efi kit I fitted to my RX3 (originally carburated here in Argentina). It's a chinese knock off losely based on the Microsquirt. I learned quite a few things… the one you mentioned being one of them. One (small, really) issue I'm having is that despite this chinese ECU being almost fully programable, it retards ignition on close throttle/coasting wich causes popping and backfires, no matter how much fuel I add or cut on the map for that situation, and that functionallity seems to be hard coded in the firmware and there is no parameter to set it (or disable it). But besides the race car blurb on deccel it Works great, so I've learing to live with it.

Just in case anybody is curious, this is the one I have:
https://www.aliexpress.com/item/micr...786077851.html

Regards,

Juanro

[NzBrakelathes]

Originally Posted by Juanro

I'm in the process of tunning a universal efi kit I fitted to my RX3 (originally carburated here in Argentina). It's a chinese knock off losely based on the Microsquirt. I learned quite a few things… the one you mentioned being one of them. One (small, really) issue I'm having is that despite this chinese ECU being almost fully programable, it retards ignition on close throttle/coasting wich causes popping and backfires, no matter how much fuel I add or cut on the map for that situation, and that functionallity seems to be hard coded in the firmware and there is no parameter to set it (or disable it). But besides the race car blurb on deccel it Works great, so I've learing to live with it.

Just in case anybody is curious, this is the one I have:
https://www.aliexpress.com/item/micr...786077851.html

Regards,

Juanro

Was looking into some other EFU stuff and ZRojo as some bikes have issues with those.
I am getting to a point where I think most of these kits are not well tuneable but they might self learn, the overall function isn't as great as it all might sound and seems they are fairly unsophisticated and not being as good at possible altitude changes or condition changes.

These kits seem popular for scooters or some street bikes maybe.
Be interesting to hear if the EFI conversion is all you expected it to be or if the costs are worth the change for what you hoped or needed it to do.

[whiplash]

Originally Posted by NzBrakelathes

https://www.magnumtuning.com/en/deta...-chip/zongshen

Hard to tell, is this capable of rich/lean adjustments across the board? I know it's old thread, sorry..

[NzBrakelathes]

Originally Posted by whiplash

Hard to tell, is this capable of rich/lean adjustments across the board? I know it's old thread, sorry..

I think only up to 6000 RPM as beyond that it is a fixed map in ECU.

[jthewood]

Will the 300 kit work on the TT250?

[rjmorel]

Originally Posted by jthewood

Will the 300 kit work on the TT250?

Doubt it cause RX3 is watercooled , TT250 is aircooled totally different motor designs, rj

[2LZ]

Originally Posted by jthewood

Will the 300 kit work on the TT250?

Nope. Two completely different motors. So far there's been no sign of a big bore kit for any CG motor.