smallheadz
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- 05 RX1
update!!!
Seat and bars are awesome.
Still have same engine issue, doesn’t do it until good and hot. New coils and plugs , fuel pumps rebuilt, carbs, fuel lines, filters, etc.. I am leaning to a pickup coil or ecm at this point. When it does it choke has no effect and person behind can smell the raw fuel when I put the choke on. I no longer believe it’s a fuel issue, now I am leaning to an electrical issue. Never does it cold. We out today -15 and didn’t do it until 6 hrs into the ride at 24 degrees. Once it starts doing it then it takes less and less time to make it do it again. Idle a few seconds and then run great again. When it did it today I put a brand new set of plugs and brand new coils on it again and went for a rip. First full throttle run it did it again. Plugs all looked good. 9200 is all I can get out of her too but that is not new. Did a 94mph run on gps early and never happened. Late in the day and it happened on a 70mph run, stumped.
Never a warning light, feels like it drops 2 cylinders. If I keep the throttle pinned it will stay WOT it only happens when you let off and get back on it. It's hard to explain .
Any thoughts?
Seat and bars are awesome.
Still have same engine issue, doesn’t do it until good and hot. New coils and plugs , fuel pumps rebuilt, carbs, fuel lines, filters, etc.. I am leaning to a pickup coil or ecm at this point. When it does it choke has no effect and person behind can smell the raw fuel when I put the choke on. I no longer believe it’s a fuel issue, now I am leaning to an electrical issue. Never does it cold. We out today -15 and didn’t do it until 6 hrs into the ride at 24 degrees. Once it starts doing it then it takes less and less time to make it do it again. Idle a few seconds and then run great again. When it did it today I put a brand new set of plugs and brand new coils on it again and went for a rip. First full throttle run it did it again. Plugs all looked good. 9200 is all I can get out of her too but that is not new. Did a 94mph run on gps early and never happened. Late in the day and it happened on a 70mph run, stumped.
Never a warning light, feels like it drops 2 cylinders. If I keep the throttle pinned it will stay WOT it only happens when you let off and get back on it. It's hard to explain .
Any thoughts?
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Fortress
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- 2004 RX1
Could be a long shot but we were having same issue kinda but I found the air filter was plugged with snow dust.
smallheadz
Extreme
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- Central Ohio
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- 05 RX1
Yes that is what it acts like and the first thing I checked when it happened. I wish it would have been that easy. Stock airbox , boots are sealed as I checked that first thing too. It does it if I'm eating dust or out in the wide open by myself. I haven't got the sled back to my shop yet to tear into it again.
This only happens after several hours of hard riding .
Happens while on a full throttle run and I let off of the throttle and get back on it fast (only after several hours of riding but you never know when it will do it). If I do this several times it gets worse and worse until it sounds like it runs on 2 cylinders. Bring it to an idle (a little bit of a rough idle when it does this) for 10 seconds or so and takes off again. It will continue to pull until you let off and get back on it. There is nothing I have found to make it stop doing this and it keeps getting worse unless I just leave it sit until the next day. So this is what I am thinking now:
TPS going wacko , I will testing it but I would think it would not come and go.
Stator with pickup: Stator getting hot and failing, I do notice grips will sometimes burn my hands up and sometimes be luke warm, so this is possible. Will test
Pickup coil usually fails and causes a no start issue, hard starting hot and most of the time all or nothing. I will test .
ECM , usually these don't fail very often but who knows
Wire harness shorting out. Possible but I would think it would be more intermittent and not temp related but possible.
Battery voltage is critical on these so maybe the stator is working until it gets hot and then once it drops enough voltage I get the issue. Battery always starts machine fast so it seems charged and was new this year.
Plugs all look good, maybe a tad lean but not too bad . May step up to 140 mains. This is not the issue but may gain some RPM's up top.
This only happens after several hours of hard riding .
Happens while on a full throttle run and I let off of the throttle and get back on it fast (only after several hours of riding but you never know when it will do it). If I do this several times it gets worse and worse until it sounds like it runs on 2 cylinders. Bring it to an idle (a little bit of a rough idle when it does this) for 10 seconds or so and takes off again. It will continue to pull until you let off and get back on it. There is nothing I have found to make it stop doing this and it keeps getting worse unless I just leave it sit until the next day. So this is what I am thinking now:
TPS going wacko , I will testing it but I would think it would not come and go.
Stator with pickup: Stator getting hot and failing, I do notice grips will sometimes burn my hands up and sometimes be luke warm, so this is possible. Will test
Pickup coil usually fails and causes a no start issue, hard starting hot and most of the time all or nothing. I will test .
ECM , usually these don't fail very often but who knows
Wire harness shorting out. Possible but I would think it would be more intermittent and not temp related but possible.
Battery voltage is critical on these so maybe the stator is working until it gets hot and then once it drops enough voltage I get the issue. Battery always starts machine fast so it seems charged and was new this year.
Plugs all look good, maybe a tad lean but not too bad . May step up to 140 mains. This is not the issue but may gain some RPM's up top.
Fortress
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- 2004 RX1
I had a bad ecm on a motorcycle once, it would be a no start till I wacked it while cranking, doesn't sound like that's the issue.wonder if you could run it with clear gas line looped up where you can see it, maybe see bubbles when you are pinning it.
smallheadz
Extreme
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- Central Ohio
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- 05 RX1
I could but I don't believe it's fuel related anymore, I can choke it when it does this and basically kill the guy behind me with raw fuel and no change. Sled should be back tomorrow for me to do some testing. I hope something electrical tests bad, fingers crossed.
smallheadz
Extreme
- Joined
- Jun 27, 2018
- Messages
- 53
- Reaction score
- 11
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- 38
- Location
- Central Ohio
- Country
- USA
- Snowmobile
- 05 RX1
another update:
Got the sled back in the shop. It's tore apart as we speak.
Stator and pickup coil checked out fine - removed anyway, everything looks good. I do have engine oil coming into the rectifier/regulator plug (3 white wires from the stator). This is fairly common on motorcycles to have this issue. Oil wicks thru the wires and travels to the plug. Doesn't seem to pose a problem. Showing 13v at idle and 14.1 @5k rpm so charging system is working.
Pickup coil ohm checked @ 207.2 so it seems to be ok (could be failing hot?).
I have checked wiring in all the problem areas, no problems found yet.
I am still stumped. After checking plug I originally took out they are lean so I am going to put 137.5 or 140 mains in it. The plugs I just took out today look rich but they only had 2 short WOT runs on them and a couple of loads and unloads off the trailer so that's normal.
Checked TPS Blue to Black 4.5k ohms (spec 4-6k) so good
yellow to black 1.4-4.2k ohms. (spec is 0-4k ohms) This should read 0 at closed throttle and 4k at WOT from the way I read it. I believe I am doing this correct, I don't see a flat spot, so could be a bad TPS, more testing tomorrow. FYI these use the same TPS as some Suzuki motorcycles and if you buy the Suzuki part it's about $90 and the Yami is $160, took a lot of cross reference but from what I can tell they are the same and there are some aftermarkets avail claiming to replace both of these numbers
Suzuki part#13580-26F00
Yami part# 4XY-85885-00-00
Carbs off and apart, they are clean, CDI off, regulator off, stator off, wire harness checked all over.
Ordered 137.5 mains, ordered TPS, may order spare stator since I have 5 gaskets now and they are easy to do. TPS would not show 0 ohms closed, it would read 500 ohms closed and around 5k open so according to manual it's out of spec. I got one from a Suzuki so I will test my theory that they will cross. Dielectric grease ordered for coils and all connections
Update, Suzuki TPS is not the same part it's exactly backwards as far as ohms and voltage so do not order one.
New mains, CDI, TPS, thermostat, temp sensor, stator with pickup. All this is getting installed now and going to try and test next week.
Got the sled back in the shop. It's tore apart as we speak.
Stator and pickup coil checked out fine - removed anyway, everything looks good. I do have engine oil coming into the rectifier/regulator plug (3 white wires from the stator). This is fairly common on motorcycles to have this issue. Oil wicks thru the wires and travels to the plug. Doesn't seem to pose a problem. Showing 13v at idle and 14.1 @5k rpm so charging system is working.
Pickup coil ohm checked @ 207.2 so it seems to be ok (could be failing hot?).
I have checked wiring in all the problem areas, no problems found yet.
I am still stumped. After checking plug I originally took out they are lean so I am going to put 137.5 or 140 mains in it. The plugs I just took out today look rich but they only had 2 short WOT runs on them and a couple of loads and unloads off the trailer so that's normal.
Checked TPS Blue to Black 4.5k ohms (spec 4-6k) so good
yellow to black 1.4-4.2k ohms. (spec is 0-4k ohms) This should read 0 at closed throttle and 4k at WOT from the way I read it. I believe I am doing this correct, I don't see a flat spot, so could be a bad TPS, more testing tomorrow. FYI these use the same TPS as some Suzuki motorcycles and if you buy the Suzuki part it's about $90 and the Yami is $160, took a lot of cross reference but from what I can tell they are the same and there are some aftermarkets avail claiming to replace both of these numbers
Suzuki part#13580-26F00
Yami part# 4XY-85885-00-00
Carbs off and apart, they are clean, CDI off, regulator off, stator off, wire harness checked all over.
Ordered 137.5 mains, ordered TPS, may order spare stator since I have 5 gaskets now and they are easy to do. TPS would not show 0 ohms closed, it would read 500 ohms closed and around 5k open so according to manual it's out of spec. I got one from a Suzuki so I will test my theory that they will cross. Dielectric grease ordered for coils and all connections
Update, Suzuki TPS is not the same part it's exactly backwards as far as ohms and voltage so do not order one.
New mains, CDI, TPS, thermostat, temp sensor, stator with pickup. All this is getting installed now and going to try and test next week.
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