2022 patriot boost no power under load w/t max rpm 4500

[Jonny.grang]

I’m stumped here I took my sled up yesterday
It was running amazing, full power, super reactive, running about 8450 to 8550 rpm
Occasionally max det (most likely too light weight 80g)
It has a brand new clutch kit in it installed by a reputable shop (had the similar problem before would randomly run like its over loaded)
But about 3 hours into riding it started bogging with no power and would not rev over 4500rpm with the belt on
With the belt off, it would hit peak RPMs and sound completely normal and reactive
So I loosened the track and changed the spark plugs about three times in the last set I put in it woke up completely normal, started ratcheting so I tighten the track back up
How about another two hours of good performance
Then started having the same symptoms as before this time I noticed it came on progressive it started bogging at low. RPMs and would open back up for a couple seconds until I let off the throttle and then progressively get worse to where it wouldn’t even open up
same problem no codes
Starts just fine
Max rpm 4500 with belt on
Could not get over 1/4 throttle or it would try to choke on itself
Sometimes it wouldn’t even move the sled on flat ground. It would feel like the brake is completely locked up (it’s definitely not)
With the belt off sounds just fine
I installed new plugs didn’t fix it
In my garage it struggles to start
fuel tank is at 35% now with 92 clear
Oil is ves and clean
And ideas?

 

[gdn]

What do the plugs look like when you pull them? Is one really wet and fouled? With no codes it sure sounds like some kind of ignition problem, losing spark. Maybe a coil or wiring issue. Just throwing ideas out there.

 

[Jonny.grang]

What do the plugs look like when you pull them? Is one really wet and fouled? With no codes it sure sounds like some kind of ignition problem, losing spark. Maybe a coil or wiring issue. Just throwing ideas out there.

Slightly black the first time
Then hold/tan the second time

 

[MICHRUSH]

I’m stumped here I took my sled up yesterday
It was running amazing, full power, super reactive, running about 8450 to 8550 rpm
Occasionally max det (most likely too light weight 80g)
It has a brand new clutch kit in it installed by a reputable shop (had the similar problem before would randomly run like its over loaded)
But about 3 hours into riding it started bogging with no power and would not rev over 4500rpm with the belt on
With the belt off, it would hit peak RPMs and sound completely normal and reactive
So I loosened the track and changed the spark plugs about three times in the last set I put in it woke up completely normal, started ratcheting so I tighten the track back up
How about another two hours of good performance
Then started having the same symptoms as before this time I noticed it came on progressive it started bogging at low. RPMs and would open back up for a couple seconds until I let off the throttle and then progressively get worse to where it wouldn’t even open up
same problem no codes
Starts just fine
Max rpm 4500 with belt on
Could not get over 1/4 throttle or it would try to choke on itself
Sometimes it wouldn’t even move the sled on flat ground. It would feel like the brake is completely locked up (it’s definitely not)
With the belt off sounds just fine
I installed new plugs didn’t fix it
In my garage it struggles to start
fuel tank is at 35% now with 92 clear
Oil is ves and clean
And ideas?

I had a similar running motor...ran great for 1000's of miles...came out of a corner hit the gas.. would only rev up about 50%...rode slow(55miles) back to the truck.. got it home assuming I had stuck exhaust valves, but it was the exhaust valve cable had broke (@7300 miles ) replace it and the sled ran better than when it was new.

 

[ullose272]

my buddy had an issue, the cable for the wastegate actuator was coming out of the wastegate so the wastegate wasnt staying closed and wasnt getting full boost