Getting rid of the roll over valve

[STAIN]

Ok. I will change my couplers to a larger 5/8 size and try to soften the turn at the top.

 

[sideshowBob]

Couple issues that I see. And I speak from experience on seeing a machine here that used a coupler to connect two hoses on the down side.

Like Bob said above, the 90 you used is a big bottle neck, and the second is the coupler you used in the middle of the hose is also a bottleneck. I've only had one sled thru here that blew the tank seal out on it after having had a coupler on it like this connecting two hoses in the same spot, I can only suspect it froze up and took the tank seal out for a second time. Another sled had a hose kink and that downward is close to kinking over time.

I've tried making the hose a 1/2" ID before and it came very close to freezing up, 5/8" never freezes or even comes close to freezing up. Even though the hole in the tank is only 1/2" ID, The fall from the loop on down needs to be 5/8 all the way thru. I learned form Louie Wirbel who installs rain gutters the the larger downward fall needs to be large and free of obstructions to keep from freezing and I believe him.

This is what I have been doing the last few years and it works out great. The 90 1/2" street elbow epoxied into another 90 elbow. Both have the large portion into the stretched out 5/8" fuel line and it makes the corner perfectly. The elbows have the same ID as the 5/8" hose and it runs straight down thru the running board with a 45 deg slash cut to the rear of the sled. Never had any sled done like this freeze up or have kinked hoses.


View attachment 174338

That is a very nice clean bypass!

 

[74Nitro]

The only potential problem I see is the 90 degree elbow. It makes a nice neat install but creates a bit of a bottle neck and potential freeze up area in the bypass hose. Most of the bypasses I have seen, including mine, maintain a nice gentle curve radius where the hose changes vertical directions from up to down.

Way too much heat in that area I would think for it to ever freeze.

 

[74Nitro]

I'm sure many here will remember the Cat two stroke sleds that had the vent from the exhaust valves. Cat had a bracket right near the exhaust outlet for the drain.

 

[fatchance]

Way too much heat in that area I would think for it to ever freeze.

It's when the sled sits after riding that creates the ice blockage. The open loop hose leaves a fair amount of frothy mess on the floor after a long ride. This is the stuff that creates the blockage

 

[74Nitro]

It's when the sled sits after riding that creates the ice blockage. The open loop hose leaves a fair amount of frothy mess on the floor after a long ride. This is the stuff that creates the blockage

Ok, I see.

 

[KnappAttack]

Ok. I will change my couplers to a larger 5/8 size and try to soften the turn at the top.

Stop! I'm telling you to stop and start over and get rid of any coupler on the downspout to prevent a problem like I've seen before on a machine. Go get 5/8" fuel line and just do it right with NO coupler so it doesn't freeze and blow a seal on ya.

If you can make a big loop without any couplers great, but some hoses want to kink and why I started doing the 180 degree at the top.

If seen kinked hoses and the couplers on the downspout freeze before so do it right.

 

[fatchance]

Knapp this will save the effort of epoxy on the 2 street fittings. They also have 5/8 OD

Amazon.com

 

[SnoWarrior]

Just finished mine on the new sled. Removed both hoses from the rollover valve, pulled wires and taped, plugged the back of the air box, installed 5/8" fuel hose.
I ran the end of the hose to the bottom chaincase drain area. Tis is what I had for 5 years on my 2018, and never a problem.

 

[Simplespeed]

Mine done exactly the same, no issues either!

 

[sideshowBob]

I have had the roll over bypass installed on my sled since the sled was brand new from advice/info from this original post in 2018 by KnappAttack.
Mike recently posted a pic of his current setup which was much cleaner then my original setup so I copied it. As always great info on our Forum!
Thanks Mike!

Pictures speak for themselves

My Original Bypass 2019 1.0

My Updated Bypass 2023 2.0

 

[blevis213]

I also copied Mike. Put bop oil tank gasket on also due to stock seal leaking. Love this site.

 

[Doc Harley]

180° fitting really clean things up. Nice find

 

[STAIN]

 

[sideshowBob]

We are going to have to rename this to the "Mike Mod"