J&L, your on the right track for helping the motor out as far as temps go.
MX bikes run rich, i have firsthand seen an injected honda 450 run 4-9k elevation and 40-90* temps and for the most part runs high 10's to mid 11's for afr except on a long WOT pull down the road it might lean out to 13. this, in general, is richer then it needs to be to produce peak power/economy combo, but works good and provides excellent response for most conditions.
Here is what happens, when say, yamaha, or kawi, or whoever purchases and efi system to put on there bike, they have options, one that has mapping for a moderate temp range(normal mx bike conditions) for XX dollars, or one with a broader range(what we see snowbiking) for XXX, well, your marketing a bike to ride on dirt, not snow, so why spend the extra money on an ecu package that costs more to be mapped in a range your not designing for. THey just have very basic mapping in that range to keep the bike running, but performance may be far from ideal. this is the area many people are running into as we take the bikes out in below freezing temps, the mapping is very sub par from the stock bike.
if you wanted to help stabalize the fueling, and lean it out possibly you could place the air temp sensor near the motor in a no flow air zone to help lean it out a little, the only downfall of this is now you need an AFR gauge to check it and monitor changes and make sure it doesnt get super warm and lean the bike way out, and then cold snow hits it then your pig rich suddenly.
MX bikes run rich, i have firsthand seen an injected honda 450 run 4-9k elevation and 40-90* temps and for the most part runs high 10's to mid 11's for afr except on a long WOT pull down the road it might lean out to 13. this, in general, is richer then it needs to be to produce peak power/economy combo, but works good and provides excellent response for most conditions.
Here is what happens, when say, yamaha, or kawi, or whoever purchases and efi system to put on there bike, they have options, one that has mapping for a moderate temp range(normal mx bike conditions) for XX dollars, or one with a broader range(what we see snowbiking) for XXX, well, your marketing a bike to ride on dirt, not snow, so why spend the extra money on an ecu package that costs more to be mapped in a range your not designing for. THey just have very basic mapping in that range to keep the bike running, but performance may be far from ideal. this is the area many people are running into as we take the bikes out in below freezing temps, the mapping is very sub par from the stock bike.
if you wanted to help stabalize the fueling, and lean it out possibly you could place the air temp sensor near the motor in a no flow air zone to help lean it out a little, the only downfall of this is now you need an AFR gauge to check it and monitor changes and make sure it doesnt get super warm and lean the bike way out, and then cold snow hits it then your pig rich suddenly.
