[R2.fast]

I have a 2010 yzfr125 With a scorpion full system. I want to make my own pop and bang map for it. It'd only be used occasionally as I am aware it can damage the engine. Does anyone have any clue on how to start making one/a decent map to build on. Thanks

 

[NorthCust]

when you say you'd like to make a pop+bang map, do you have some sort of ecu/piggyback device into which you would actually load that map? e.g. a Power commander or similar type device?

> I want to make my own pop and bang map for it. It'd only be used occasionally as I am aware it can damage the engine

I don't think that's necessarily true re engine damage, especially if it's popping and banging because you've mapped it to do so, rather than as a by-product of it being too lean (which would be far more likely to cause issues).


This may be of interest:

Interview with dynojet – in detail on power commanders | NorthCust - Built with love <3 - YZF-R125 Tuning, Stretched scooters, Custom parts and Fabrication Projects, Northampton, UK

northcust.co.uk

 

[R2.fast]

Yes I've got a dynojet power commander 5. I'll check that out cheers

 

[NorthCust]

oh right, same here... tho mine burbles and splots quite nicely without any special effort so I haven't messed with it.

In the PCV software I think you'd be looking primarily at values to the bottom/left of the main diagonal line (which goes from top left to bottom right). Anything under that diagonal area is basically overrun, so it would pop and bang as you let off the throttle .

If you have a PCV but no autotune then presumably you got it dyno'd so idk how keen I'd be to mess with that map but if you keep a backup and perhaps start with the values furthest down and left out and test your way in (so if you're going along at 10k and you drop the throttle to 0 you'd be affecting the bottom left cell. Dropping 10 off a range of values shouldn't do any damage but should give you a detectable difference when riding. Afaik leaner is the way to bangs rather than richer but it's no treally somethign I've played much with since my makes very nice knacks and burbles and pops as it is...

In the PCV software under "environment options" there's "cell tracer" option. Enable that and it highlights the current cell it's using when you have a laptop plugged in and the bike's running. That way you can simulate riding along... then drop the throttle and see which cells you're hitting... those cells/that range is where I'd be tweaking (reducing the values).


If you haven't done so already you can fit a handlebar switch to go into the PCV which will let you switch between maps - so that way you can have your current/base map (safe) and an experimental/alternative one and means you can switch between them while riding/testing. IIrc you need to enable the second map in the PCV software (whcih i forget how to do offhand) and then when you send a map it lets you send it to slot 1 or 2 respectively.

The switch can be any switch, we're effectively just looking to short those two contacts on the PCV. The PCV installation pdf has the details of which pins to connect the switch to: Usb Connection - Dynojet Power commander v Installation Instructions Manual [Page 2]

and a switch like this will do the job:

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(adding pic for when the link goes dead)


Hope that helps,

NC

 

[R2.fast]

Yeah mine will pop and crackle but won't bang as such. I've changed the pipe on it to a black widow. I did have a play around with the 0 throttle ratio but It didn't make a noticeable change and I had dropped the values to about -20. I'll have another play around with it in a few days and I'll let you know how It goes. Cheers for the advice