Front tunnel closeup Phazer FX. Concerns about heat under tank.

[Antewallgren]

Hey there all!

I just bought my sled three weeks ago and when I got home I noticed that the tunnel was wide open. It had previously had the metal sheet to cover up the hole but was now gone. So I searched about it and I made a mistake. I was under the impression that the Yamaha tunnel closing kit included a sheet of metal of the front hole aswell.

Anyhow I had already closed off both holes when I read that the kit only included a sheet for the back.

I have removed the rubber flaps under the tank to allow more hot air to escape through ventilation, I also trimmed off the aluminium that was under the seat frame. My fibre shield that goes over the flex joint was in a thousand pieces, so I bought one of theese and put it over instead of the fibre shield: https://www.biltema.se/bil---mc/tuning/avgasror/varmeskold-2000022291

I then used header wrapping from the flex joints and covered maybe 30CM so I stopped somewhere outside of the tank. Im worried it will get too hot even with my precautions. So Im looking for a bit of a guidance! I also put some of the heat material over the plate that goes over the exhaust.

Heres some pictures: https://photos.app.goo.gl/7TECNSqMNJ5H1vbNA

I was thinking that maybe I could put a thermometer under the tank and see how hot it gets?

I know I put the heat shielding upside down, but maybe that doesnt matter? =D

 

[MrSled]

I truly dont believe you will have a problem. @cannondale27 ran a Phazer for a long time and maybe he will step in.

 

[Mooseman]

I used the same type of sheet heat shielding on mine that was stick-on and used some rivets to keep it in place. However, I left the front hole open. Haven't seen or heard of anybody blocking off the front hole, even on Venture Lite/MP with tunnel icing problems. The exhaust gets really hot on these sleds and having red hot pipes under a gas tank is not a good idea. I would leave that hole open.

The rear hole was blocked off to stop snow accumulation

 

[Antewallgren]

I've read quite a few posts saying they closed the front hole as well. Maybe I'll try putting a thermometer under the tank and see how hot it gets.

 

[cannondale27]

Yes I have had front and back closed for years now. No issues.

 

[Antewallgren]

Yes I have had front and back closed for years now. No issues.

Did you add any insulation to combat the heat from the exhaust?

 

[cannondale27]

Did you add any insulation to combat the heat from the exhaust?

No. Just did like you and cut the rubber off the upper shield to get more airflow.

 

[Antewallgren]

No. Just did like you and cut the rubber off the upper shield to get more airflow.

Okay, maybe im fine then!