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Old 09-05-2011, 10:27 AM   #1
batoutoflahonda OP
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Joined: Aug 2007
Location: Easton Wa
Oddometer: 1,376
R80G/S montain passes-what's your speed?

So never having an airhead, and before I go chasing my tail. I haven't done a compression check or checked float bowl levels (winter projects). Bike has 76K on it, accelerates fine and does 90mph easy on a flat run. That out of the way:

On long mountain passes I can barely make 75 mph, pinned (only me on it). Particularly Snoqualmie pass here in WA. Or Pocheco pass down in Cal, were with a head wind I was barely making 65. So, I thought I'd 'ax all yous all, how's yours do?
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Old 09-05-2011, 10:55 AM   #2
SOLO LOBO
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Location: Shoreline, WA
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Over Snoqualmie I can hit 85 without running out of stick, my last compression check showed roughly 160 Lb/in2 on both sides.

I'd say that struggling to hit 65 means there is some work in your future
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Old 09-05-2011, 11:53 AM   #3
fishkens
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Hmmm, my '88 100 GS (w/ 9.5:1 Siebenrock pistons, 290 lbs if rider and gear) comfortably pulls 75 - 85 up Snoqualmie pass. It definitely won't rocket through to 90 - 95 up the passes but it's also not wheezing either.

Barely making 65 sounds a bit anemic.

I think you know the drill: compression check (or ideally a leak down test), rebuild carbs (worn needle and jets can cause it to be sluggish), clean air filter, etc.
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Old 09-05-2011, 02:23 PM   #4
batoutoflahonda OP
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Yeah, that's what I thought. I had plans on a timing chain/top end for the winter as oil consumption is over 1/2qt/1K, and my timing marks are a bit erratic (plus the road side BMW prophet i met in Cave Junction OR, put his ear to my engine and said the chain was bad. And that I would win the lotto. He's 50% so far )

Thanks
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Old 09-05-2011, 06:47 PM   #5
Wirespokes
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It could be running rich - that'll make it sluggish. Needles and needle jets been replaced?

How about the float level?

With the low gearing, it should easily make it over the passes, even if the engine is getting tired (doesn't sound like it - a qt in 2K isn't bad). I've got bikes that use more oil than that and don't go anemic at altitude.

Sounds like a tuning issue to me.
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