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From: The Older Gentleman on 27 Jun 2007 02:29
Dave <dspear99ca(a)yahoo.delete.com> wrote:

> I put my hands behind the two pipes, and there was WAY WAY
> more pressure coming out of the left pipe vs. the right. Intuitively this
> seems very wrong.

I'd expect this, if the right hand pot wasn't running right.

>
> Anybody have any thoughts? Bad spark plug?

Just an engine waking after a long sleep.....

>
> BTW the bike ran great, enough power to remind me that I never did get
> around to replacing the front sprocket this winter... the engine sounds fine
> and seems to run fine once warmed up marginally.

So leave it alone. If it ain't broke, don't fiddle with it.

Lovely bikes, btw. I've owned four or five and want another.


--
BMW K1100LT 750SS CB400F CD250 SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
From: chateau.murray on 27 Jun 2007 08:36
On 26 Jun, 20:38, "Dave" <dspear9...(a)yahoo.delete.com> wrote:
> After a recent bout of twin-bashing on rec.motorcycles, I dragged out my old
> XS650 parallel twin last night and took it for a ride.

<snip>

Your comment about the sprocket reminded me - US models run lower
gearing than European. Going up one tooth on the gearbox sprocket
makes them run much more relaxed at cruising speeds. Of course, you
lose the acceleration, but these days nobody uses an XS650 for drag
starts, do they?

The taller gearing improves the fuel consumption markedly, as well.

And if you want a neat tip, drill a hole in the sprocket cover,
immediately above the sprocket, and route the rocker box breather pipe
down to it. Obviously, make sure the hole is the right size for the
pipe to be a tight push fit in it. The oil fumes from the top end come
down and lube the chain.

God, I'm getting the yen for another XS650 now. <Scans Ebay>

From: Hank on 27 Jun 2007 15:55
Less volume out might mean less volume in, from a sticking carb slide maybe?
Or reduced pumping efficiency caused by leaking valves or stuck rings?
"Dave" <dspear99ca(a)yahoo.delete.com> wrote in message
news:F2dgi.11360$tB5.9817(a)edtnps90...
> After a recent bout of twin-bashing on rec.motorcycles, I dragged out my
old
> XS650 parallel twin last night and took it for a ride. The ride was good,
I

>


From: chateau.murray on 28 Jun 2007 04:34
On 27 Jun, 21:55, "Hank" <u...(a)nbnet.nb.ca> wrote:
> Less volume out might mean less volume in, from a sticking carb slide maybe?
> Or reduced pumping efficiency caused by leaking valves or stuck rings?"Dave" <dspear9...(a)yahoo.delete.com> wrote in message
>

I bet there's still nothing wrong with it, now it's been used....

From: Badger on 28 Jun 2007 08:49
Hank wrote:

> Less volume out might mean less volume in, from a sticking carb slide
> maybe? Or reduced pumping efficiency caused by leaking valves or stuck
> rings? "Dave" <dspear99ca(a)yahoo.delete.com> wrote in message
> news:F2dgi.11360$tB5.9817(a)edtnps90...
>> After a recent bout of twin-bashing on rec.motorcycles, I dragged out my
> old
>> XS650 parallel twin last night and took it for a ride. The ride was
>> good,
> I
>
>>


Do these bikes have a balance pipe or collector box?, it may be that the
silencer has corroded internally and it is partially choked. If it is one
header to one silencer with no link pipes, then the above does not apply.

Are the carbs in sync?, if you have a carbtune ( or similar ), these are
great for troubleshooting.

Can you access the slides through the airbox?, if you can, lift both slides
and then let go. They should drop together, and they should be damped. If
one slide seems to stick, you probably just have a small amount of
corrosion on the slide, easily sorted.

That you said it runs great doesn't point to any major mechanical grief.

Lovely bikes. I quite fancy a cafe racered one.
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