2022 850 boost fouling multiple plugs per ride

[Isaac254]

I bought a 2022 khaos 850 boost from someone riding in Revelstoke. I have been riding it at sea level in Ontario and I cant go more than 15 minuets without fouling a new set of plugs. the sled starts bogging in deep snow revving 7000 at best and loses rpm until it dies. Idling seems to make it worse but even when I'm revving 8400 it will bog out of nowhere. changing plugs fixes the issue for a short time.

I'm wondering if there is different ECU flashes for different elevation or if there is any other possible fixes. Is there updates between 2022 and 2025 for ecu things? I've tried BPR8ES, I don't think its a spark plug issue, but I'm not sure how to diagnose

 

[JH@CM]

I'd get it to the dealer and make sure it has the updated flash.

Clutching/gearing are the only differences between low and high elevation (from the factory).

 

[local 307]

Not to sound mean so please dont take this wrong. Are you 100% sure you are getting your caps all the way on? I know this sounds simple but I have sledders drive to my place for runability issues and 99% of the time the caps aren't all the way on. They are a really tough to get on the last little bit but, if can see more than a dime width of porcelain your caps are not all the way down. I just had a guy from Michigan drive two hours on Friday and both sleds had about 3/16" of porcelain showing. Snapped them down and away he went. I talked to him this morning and he has not had any further issues. Hope this helps.

 

[Sheetmetalfab]

Not to sound mean so please dont take this wrong. Are you 100% sure you are getting your caps all the way on? I know this sounds simple but I have sledders drive to my place for runability issues and 99% of the time the caps aren't all the way on. They are a really tough to get on the last little bit but, if can see more than a dime width of porcelain your caps are not all the way down. I just had a guy from Michigan drive two hours on Friday and both sleds had about 3/16" of porcelain showing. Snapped them down and away he went. I talked to him this morning and he has not had any further issues. Hope this helps.

I'm always "helping" people with run-ability issues the same way.

 

[Isaac254]

Unfortunately its not as simple as snapping them further on. I went to take it to the dealer after going over it again myself and it started and idled for no more than 2 minuets and both plugs fouled again. Hadnt even made running temp

 

[NapaMatt]

Id start with Replacing the Wide open injectors! AUX injectors should be replaced to the new 2025's