Exciter Bog Problems in Deep Powder

[smith311]

I am the proud new owner of two Yamaha Exciters. One '88 and one '91. They run great most of the time. The problem I am having is when I get into deep powder and start carving, both sleds sometimes bog out. The track will eventually stop and then the sled will not rev past 4500rmp...not enough to get the track going again. I can solve the problem every time by opening the hood. At this point the seld will rev again, track will spin and off i go with the hood open. Once out of the powder and can close the hood and all is well. The plugs don't seem to be fouling...both machines have 136" X 1.5" tracks, and the '91 has an aftermarket pipe, but besides this all stock. Any ideas on how to avoid this problem? I am guessing i'm getting snow in the intake or exhuast. but being new to sleds that is just a guess. the '91 has some of the insulation taken out from under the hood, but the '88's is all intact, so i don't know if this could be the problem. thanks for an ideas.

 

[Born2Burn]

Ah yes the Exciter bog........been there done that.........the prob is they build heat under the hood. This is happening because what little venting was provided from the factory was not adequate. When you are playing in the powder the stock venting gets plugged, thus causing the air to heat up under the hood and causing the engine to momentarily run super rich......once the hood is lifted cold air rushes back in to the engine compartment and your back running with clean <cold> air again. Was just the nature of the beast on those years of sled. Look into aftermarket venting add ons. Maybe something in www.deniskirk.com or something. Hope this helps.
Good luck

 

[smith311]

wow, thanks for the input. thats the most logical answer i have come across yet. when i open the hood there doesn't appear to be alot of snow in the intake area, so it didn't make sense that the snow was getting in, but hot air...very interesting, maybe tomorrow i'll take it up and pop the hood off and see how it runs, if it doesn't bog out with the hood off then there is definately not snow getting in when the hood is on. right on, ill see what i can find out about more ventilation. worth a shot. thanks.

 

[Bagger]

If you have the hood off, place some pantyhose, or "kneehighs" over the intake before hitting the powder. B

 

[RX-1MT]

put a small flow rite vent in the back side of the air box not big 2" is more than enough problem will go away!!!!

 

[APEXed West]

My Dad and I put 12,000 miles combined on an 87 and 89 exciter that we long tracked. Put Reichards Performance Center Cold Air Induction kits on both and never had an issue until the foam inserts plugged. Easy to clear simply by pulling the insert out and banging them on your knee to knock the snow off. The kit basically consisted of a intake cover the size of the panel under the head light, with an opening the width of the panel on the backside and 1-1/2 inches tall with a very porous foam insert in the opening. The stock airbox was ducted into the cold air intake. This was a sweet set-up.

The site is currently down, but can check at www.rpcracing.com when it comes back on line if they are still in business.

Also, they had a conversion kit to change out the POS Yamaha clutches to Cat clutches, best performance upgrade we ever did to our Yamaha's. Also ran the Cat clutches on 96 V-Max 600's and a V-Max 4, worked great. Hope this helps.

 

[smith311]

thanks for the input, ill give these leads a try.

 

[rickyrick013]

dude we had an exciter and a phazer a while ago and we had the same problem you do. its ALL about venting with those sleds those hoods are half inch thick i swear, get some vents on those bad boys and you will be in bussiness. good luck.

 

[Impatientforsnow]

hey do you guys have any pics of this?? I think my sons 1990 phazer II is doing the same thing .. also is there jetting needed to be change after you put vents in??
any info would be great..