Newly developed bog/sled falls on its face

[BradM8]

I would look at replacing the spark plug boots. On my 2010 m8 I was chasing a long time bog which turned into intermittently running on only one cylinder. The connection that grasp the spark plug conductor was worn to almost nothing on that side. If you are seeing wear on the plugs it almost certainly would wear the conductor as well. You can get the boots from NGK and are fairly inexpensive.

 

[clutch]

Injectors. Been there, done that.

 

[Vern]

Well finally went and threw the old clutch on, minus the ring gear cuz it’s on the new clutch, and it was still there. I guess that rules that theory out as I never had an issue at home with the team. Tach’d 100-200 rpm lower at peak with the team setup. Tried checking the peak rpm on the gauge which worked, but it said the same 8683rpm every time on either clutch so don’t think it’s accurate. Probably have to reset it somehow.

The cutting out didn’t seem as bad tonight, but I also didn’t run it as long as the other day so who knows, the sea foam may or may not be doing something. I did get another faint pop out of the exhaust again though.

I do have a spare pipe sensor I can throw in just to rule that out, but its starting to sound like an injector issue. I know they’re the same sled, but does anyone know for sure if electronic parts are interchangeable from the Yamaha to the cat? Injectors are almost half the cost for the mtn max vs the cat.

 

[boondocker97]

I would look at replacing the spark plug boots. On my 2010 m8 I was chasing a long time bog which turned into intermittently running on only one cylinder. The connection that grasp the spark plug conductor was worn to almost nothing on that side. If you are seeing wear on the plugs it almost certainly would wear the conductor as well. You can get the boots from NGK and are fairly inexpensive.

FYI a few years back NGK went to a system where they no longer sell the spark plug caps used for OEM powersports applications through their distributors. I did find one that would work in a pinch at an auto parts store, but it was hard plastic with a rubber boot at the base and did not sit on the plug as nice as the OEM ones and would rattle a bit. So whether you have an Arctic Cat, Yamaha, or Harley Davidson you won't get the OEM quality caps without going through a dealership or place that handles OEM parts. Carry on.

 

[boondocker97]

What’s the belt to sheave clearance supposed to be on these roller clutches?

When I ran it in the hills at elevation at the end of last season it wasn’t this bad. Ran fine 90% of the time with the occasional falling on its face. Haven’t dared take it on an actual ride yet this season with all this going on down here at home. That’s part of what has me wondering about the weights being to light down here. Might have to just bite the bullet and drag it up the hills and see what happens.

I don't know if the clearance is any different for the roller clutch, but I always thought 0.20 was ideal. Can't see why these would be any different.

 

[Vern]

I’ve looked into the spark plug caps, you can’t find matching ones from anywhere but cat and they’re about $25 a piece. I was considering just buying the hi performance wire set from slp for not much more than two oem plug caps.

As to the belt to sheave clearance, I can fit at least .070” worth of feeler gauges between the belt and sheave on the adapt. Didn’t check the team, but being as my issue was still there with the team tonight I’d say that’s not the issue.

 

[Old & slow]

The pipe sensor will create a rick condition if it is failed, but it should be more consistent. Easy swap and cross another one off the list. Do you get a chance to bypass the ignition switch ,tether and kill switch? I am happy it wasn't the clutch but its crappy that your still looking. Although the circle is getting smaller. If it is injectors it would be interesting to find out if these are proprietary or just an automotive injector like the pipe sensor. Also is there a core on the injector, automotive ones have a core so someone is rebuilding them. It would take some digging but may pay off in the end.
Vern to reset the the max rpm press and release the lower right button while the max rpm is being displayed.

 

[Vern]

I haven’t messed with unplugging things yet, partly because I keep forgetting about it and partly because it’s been cold as balls so I’m trying to spend as little time out side messing with it as possible. I don’t have a garage or shop.

I tried looking up the manufacturers part number for the injectors off of country cats website, but couldn’t find anything so maybe they’re proprietary. It would be nice to know if the yammi injectors are a direct swap as they’re only like $95 a piece online and cat wants like $165 a piece. I’m sure they’re physically the same, I just worry about the programming aspect. If the flow numbers or whatever you would have to program into the sled are the same and cross over.

 

[Old & slow]

Vern I cant see the injectors from Yamaha being any different. There was an article about the MM and the guy said it was different programing but later retracted the statement saying it was the same as AC . Most likely the same part number on the injector at least you could compare them.

 

[DDECKER]

Amazon product ASIN B085RHK74P

 

[Vern]

Too bad it says out of stock on those units on Amazon. Im sure one could by an equivalent from deka if we knew the actual specs. I tried looking real quick on dekas sight for the v-4p and didn’t see anything that matched that specific number.

 

[Old & slow]

Vern did you figure out your bog business yet?

 

[Vern]

Not sure yet, the new pipe sensor made no difference so I bit the bullet and ordered new injectors. Unfortunately the local Yamaha dealer told me they couldn’t get the injectors so I had to pay cat price. Anywho, those just showed up yesterday so I threw them in, not a very fun job. Now I’m just waiting to get it in for the programming aspect of the injectors the beginning of next week, but the tech at the local cat dealer didn’t even know that was a thing ?‍ so we’ll see how that goes. He’s supposed to look into it before I bring the sled out on Tuesday.

While it was apart waiting on the injectors to show up I pulled a bunch of connections apart and cleaned and greased them, and ohm’d out the coils and plug wires which appeared to be in spec. So fingers crossed that something I did fixed the issue. I’ll report back after the dealer figures out what they’re doing and I get another test run hopefully next week.

 

[Albatroz]

Not sure yet, the new pipe sensor made no difference so I bit the bullet and ordered new injectors. Unfortunately the local Yamaha dealer told me they couldn’t get the injectors so I had to pay cat price. Anywho, those just showed up yesterday so I threw them in, not a very fun job. Now I’m just waiting to get it in for the programming aspect of the injectors the beginning of next week, but the tech at the local cat dealer didn’t even know that was a thing ?‍ so we’ll see how that goes. He’s supposed to look into it before I bring the sled out on Tuesday.

While it was apart waiting on the injectors to show up I pulled a bunch of connections apart and cleaned and greased them, and ohm’d out the coils and plug wires which appeared to be in spec. So fingers crossed that something I did fixed the issue. I’ll report back after the dealer figures out what they’re doing and I get another test run hopefully next week.

I'm interested in if it solves the issue! Let us know when you tested it

 

[clutch]

I changed the injectors, and didnt get them programmed. It cured the problem. I'm sure it would be better to have them programmed to the ecu, but i had a pcv to adjust mapping if i needed to.

 

[Tewstroke]

I changed the injectors, and didnt get them programmed. It cured the problem. I'm sure it would be better to have them programmed to the ecu, but i had a pcv to adjust mapping if i needed to.

Did you see that the TPS worked in a smooth manner throughout it's range with a multimeter?

Some will be " in spec" on each end of the scale, but will be bad somewhere in the sweep.

 

[Vern]

I changed the injectors, and didnt get them programmed. It cured the problem. I'm sure it would be better to have them programmed to the ecu, but i had a pcv to adjust mapping if i needed to.

I’ve heard a few people say they never had them programmed and they worked fine, but I’m gonna try and do everything correctly just to be safe.

 

[clutch]

I have a cat tps tester, and it was doing what it was supposed to. This was better than a year ago. Dont remember specifics. My sled had the occasional bog from brand new, but continued to get worse, and worse. Checked all the wiring, the electronics the compression, the reeds, ( and even changed them to v force) and finally put in the injectors.

 

[Old & slow]

Vern I see Bikeman cleans and tests injectors. 40 bucks a injector. Wish I had seen that a few weeks ago.

 

[Vern]

Could be worth sending the old ones out still to have a spare set on the shelf with what new ones cost.