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Little help please!

Curt Russell

Tuned and Synch'ed
Joined
Oct 10, 2016
Messages
74
Location
Ca.
I believe my mechanic filled the rear end diff with 430cm instead of 250cm as the manual specifies. I believe he used the gearbox capacity instead of the rear end. In any case I’m on day one of a five day trip and the rear end is dripping oil on the wheel and tire. I am wondering...... would the overage vent out or is it expanding and blowing out the seals. Nearest Dealer is in Vegas and not open until Tuesday. Any suggestions appreciated.
 
Why not undo the drain bolt and remove the excess, or drain it completely and then refill with the correct amount. Oil on a rear tyre is not a good combination.
Kev
 
What Kev says above. Drain it all and refill. Hopefully it didn't blow a seal.
 
I believe my mechanic filled the rear end diff with 430cm instead of 250cm as the manual specifies. I believe he used the gearbox capacity instead of the rear end. In any case I’m on day one of a five day trip and the rear end is dripping oil on the wheel and tire. I am wondering...... would the overage vent out or is it expanding and blowing out the seals. Nearest Dealer is in Vegas and not open until Tuesday. Any suggestions appreciated.

Watched the mechanic at my dealers refill my diff a couple of days ago and he just filled it to the bottom of the filler hole, no measurement required.
 
depends how desperate you are. The black plastic collar between wheel and diff is the problem. It could be sliced in key places to get access and maybe replaced or removed altogether after the trip.
 
Maybe clean the oil off and ride it easy and see if it does it again, maybe it's blown the excess out and will be ok.
 
Maybe clean the oil off and ride it easy and see if it does it again, maybe it's blown the excess out and will be ok.
I think this is good advice. After returning from a 4 day trip a couple of weeks ago, I noticed some lubricant on my rear wheel and in the clear tube under the bike. Wasn't until the last day that I sustained speeds of 90+ in the mountains. Speed = pressure = lubricant venting from the final drive, gearbox, and engine. I probably put a tad too much in when I changed all the lubricants at the last service.
 
Thanks for all the great advice guys. So ... to make a long story short, I rode on to Las Vegas and got a room and then today I found a shop open on Mondays called Main Street Moto, A repair shop servicing mostly Harley’s. They had my bike on a lift within minutes. Turns out the differential still had to much oil in it, and yes it has a vent. This is where all the oil was coming from and prevents the pressure from blowing the seal which was fine. Drained it and filled it with the proper amount and I was on my way again by noon today. To bad I paid for two nights stay but I am happy I only lost half a day. Thanks again for the replies, you guys are great.
 
Thanks for all the great advice guys. So ... to make a long story short, I rode on to Las Vegas and got a room and then today I found a shop open on Mondays called Main Street Moto, A repair shop servicing mostly Harley’s. They had my bike on a lift within minutes. Turns out the differential still had to much oil in it, and yes it has a vent. This is where all the oil was coming from and prevents the pressure from blowing the seal which was fine. Drained it and filled it with the proper amount and I was on my way again by noon today. To bad I paid for two nights stay but I am happy I only lost half a day. Thanks again for the replies, you guys are great.

Glad it all worked out for you....
 
my plan is to make a cutout on the spacer shield so the fill plug can be accessed then using a syring with a flexible tube fill the diff to the proper amount.

BTW do you notice if the diff is getting hot after about an hour of fast riding?

My diff is running at about 160F after and hour of riding at 70 mph
 
"A repair shop servicing mostly Harley’s. They had my bike on a lift within minutes."

Did they comment on how cool it must be to have a rugged shaft drive on a heavy cruiser instead of a belt that breaks, ha ha. (not a Harley hater; I own a Road King).

Good end to your story!
 
my plan is to make a cutout on the spacer shield so the fill plug can be accessed then using a syring with a flexible tube fill the diff to the proper amount.

BTW do you notice if the diff is getting hot after about an hour of fast riding?

My diff is running at about 160F after and hour of riding at 70 mph

Diff getting hot: between Victorville and Vegas I stopped and checked the temp by hand Three or four times. Always hot to the touch but only slightly hotter than my buddie’s BMW. 160F sounds about right.
 
"A repair shop servicing mostly Harley’s. They had my bike on a lift within minutes."

Did they comment on how cool it must be to have a rugged shaft drive on a heavy cruiser instead of a belt that breaks, ha ha. (not a Harley hater; I own a Road King).

Good end to your story!
No but he immediately made a joke about how experienced he is at dealing with roadside problems because he works on Harley’s. No comments about the shaft drive but complimented me on the sound of my Guzzitech exhaust system. I thought Harley’s belt drives were pretty solid?
 
"I thought Harley’s belt drives were pretty solid?"

I've broken two of them, though admittedly once was at the drag strip.
 
"I thought Harley’s belt drives were pretty solid?"

I've broken two of them, though admittedly once was at the drag strip.
OK, maybe just comparing them to Ducati’s first attempt at belt drive on the Xdiavel. The belt is fine but the belt guard is garbage and allows debris to enter the area. Usually. Not a fan or a hater of Harley’s but thought that is one thing they had down pretty good. But .... I prefer the reliability of the shaft on our Guzzies.
 
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