Wilsons Sandbox

On Tue, 25 Sep 2007 21:34:01 -0000 "rallyrabbit" writes:

> Hey- > > I am at wits end. > > I went for a good muddy wet ride two weeks ago on my 24,000km '89 > KLR. I dropped the bike once at low speed with no damage. I stopped > > for fuel when I was back in town. A few minutes later on the freeway > > I noticed a power loss at higher speed. The bike would not go above > > 5000 RPM (110km/h). Bike starts and runs fine. > > I assumed that I had gotten bad fuel and drained the tank and float > > bowl and refilled with new gas with carb cleaner added. I pulled the > > petcock and checked the screens - clean. I connected another line to > > the vacuum post on the petcock. It appears to be working fine. > > No joy. > > I replaced the spark plug, and checked and cleaned electrical > connections. Checked air filter -clean. > > No Joy. > > I pulled the carb, dissasembled and cleaned. Main jet and needle > looked good. No sediment or debris visible. I inspected the slide > diaphragm. It looked okay, but I replaced it. (Thanks Harley) > No Joy. > > I pulled the carb, dissasembled and cleaned. I inspected the slide > diaphragm. The new one looked okay, and well seated, but I pulled it > > out, and reseated it. Cleaned the main jet and needle again. Checked > > valves - A little tight, but still within spec. > > > No Joy. > > I have run out of ideas. Thoughts? > > Thanks, > Matthew

<><><><><><><><> <><><><><><><><> Matthew, The first thing that comes to mind when reading this is the throttle isn't opening fully. Will the engine go over 5,000 rpm in other gears? Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT

--- In DSN_KLR650@yahoogroups.com, "rallyrabbit" wrote:

> > Hey- > > I am at wits end. > > I went for a good muddy wet ride two weeks ago on my 24,000km '89 > KLR. I dropped the bike once at low speed with no damage. I stopped > for fuel when I was back in town. A few minutes later on the freeway > I noticed a power loss at higher speed. The bike would not go above > 5000 RPM (110km/h). Bike starts and runs fine.

Matt, Take a look at the aircleaner. You may have finally saturated the aircleaner with dirt and the bike cannot breath. revmaaatin.

--- In DSN_KLR650@yahoogroups.com, Jeff Saline wrote:

> > Matthew, > > The first thing that comes to mind when reading this is the throttle > isn't opening fully. Will the engine go over 5,000 rpm in other

gears?

> > Best, > > Jeff Saline > ABC # 4412 South Dakota Airmarshal > Airheads Beemer Club www.airheads.org > The Beautiful Black Hills of South Dakota > 75 R90/6, 03 KLR650, 79 R100RT >

Hi Jeff- Thanks for your message. The bike starts and runs fine. It revs smoothly to redline with no load. It's just under load that is is louder with no power. Matthew

> > Matt, > Take a look at the aircleaner. You may have finally saturated the > aircleaner with dirt and the bike cannot breath. > revmaaatin. >

Hi revmaaaaaaartin- Thanks for the tip. Airfilter is clean.

On Wed, 26 Sep 2007 15:01:16 -0000 "rallyrabbit" writes:

> Hi Jeff- > Thanks for your message. The bike starts and runs fine. It revs > smoothly to redline with no load. It's just under load that is is > louder with no power. > Matthew

<><><><><><><><><><> Matthew, Will the engine redline when under load in other gears? What do you mean by louder with no power? Is the noise from the exhaust or somewhere else? Have you taken a look to make sure the throttle is fully actuating the carb butterfly? Maybe disconnect the cables and see if the throttle linkage mover further than what you've got with the cables connected and while using the throttle on the bars. Just a couple more questions and thoughts. Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT

On Wed, Sep 26, 2007 at 02:15:03PM -0700, Robert Waters wrote:

> Sounds like someone put a governor on it? LOL

I would suspect a torn / leaky / rotten vacuum diaphragm on the slide. When you whack the throttle open, that doesn't directly lift the slide, it just rotates a butterfly valve that alters the vacuum in the throat of the carb. The slide actually gets lifted by lower pressure above the diaphragm compared to below it. If the diaphragm leaks, the slide won't lift all the way. It's not at all uncommon for the diaphragms to fail, and when they do the engine will run exactly as you have described. I believe TPI keeps the slide/diaphragm assemblies in stock for cheap. Michael -- "It's not what I don't understand about religion that bothers me, it's what I do understand." -- Mark Twain San Francisco, CA

I've decide to buy some pants I'll use. I have a pair of leather Fieldsheer sport pants I only wear in front of the mirror! OK, maybe I've worn them once or twice. Got them when I had a /7 BMW. A crushed knee is a bad thing. I have two crushed big toes thanks to those gorgeous air heads (perfectly situated to crush your toes). Oh yeah, I can't run (I love to run - soccer player and runner), I can't squat - yeah, you use your toes alot there, and I can't reach for things up high - yeah - toes again. So, winter coming, I've decided to get some useful pants. While I love the Olympia Ranger 2s, and some others, you can get some sweet Tourmaster pants for $100. Though I did vow to never buy another Tourmaster product again after their winter gloves and non-customer care pissed me off, they do have sweet stuff. I have another pair of gloves and a rain suit that remind me of their general quality and understanding of moto riding. BEWARE - NEVER BUY ANYTHING FROM MOTORSPORTS IN ALBUQUERQUE - They are truly useless losers and evil bastards tambien. Anyway. I'm not cheap, but I'm broke, so I spend it when I have to. I have a nice Fieldsheer leather sport jacket, a First Gear mesh jacket (paid too much locally and then got screwed by Motorsport on a quality issue - screw local, buy newenough.com), and a big fluffy Roadgear winter jacket that is another long story, but they all have armor and my shoulder still works just fine!! Robert Hedrick Albuquerque, NM ____________________________________________________________________________________ Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7