[dsn_klr650] tire irons

[cloudhid@aol.com]

>anyone have the link to the stock exhaust cutaway?

Courtesy of Skip. http://members.aol.com/cloudhid/exhaust.gif Redondo Ron

[wileyE_@excite.com]

Thanks Skip and Ron, The cutaway just verified my thoughts about drilling out the endplate. Mine will stay intact. For anyone interested I did some revealing testing last summer that proved to me that the airbox and pipe are not really as 'corked up' as one might assume. I got a cobra isde with the bike and thought I'd give it a try. It had been drilled out and was pretty loud. Not wanting to lean out I started my CV carb mainjet selection process. Off came the front fender and handgards and out to the top speed proving road. In trying to find the main size that gave the best top speed (this method works for me) I found the bike had lost some. I tried a bunch of jets with the airbox in different configs (cover off, snorkel off etc) and couldn't mach the stock "corked up" speed. Called a bud and borrow his supertrapp, was up to 12 discs and same story. The stock pipe, dyno jet w/140, box intact always gave the same or better results on the top end. Not saying the other pipes or box mods are junk or don't improve sound or throttle response but if the stock box/pipe was corked up I would thing it would have shown at top speed. I am building a "can" made with calculated quarter wave baffles based on the airbox volume, can't wait to hear it and test it against the stocker.

[Kurt Simpson]

> story. The stock pipe, dyno jet w/140, box intact always gave the > same or better results on the top end. Not saying the other pipes or > box mods are junk or don't improve sound or throttle response but if > the stock box/pipe was corked up I would thing it would have shown at > top speed.

My SOP dyno told me similar things but I've always thought the mods improved the low and mid-range response...albeit at the sacrifice of top end... Kurt

[Jim Hyman]

--- In DSN_klr650@egroups.com, "Kurt Simpson" wrote: [snip] >> story. The stock pipe, dyno jet w/140, box intact always gave the >> same or better results on the top end. Not saying the other pipes >>or box mods are junk or don't improve sound or throttle response >> but the stock box/pipe was corked up I would thing it would have >> shown at top speed. >> > My SOP dyno told me similar things but I've always thought the mods > improved the low and mid-range response...albeit at the sacrifice > of top end... > > Kurt ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Generally, if your valves are adjusted to the tighter side of the speck, this will give you somewhat more top-end power, with a slight loss of low & mid-range power. Also, valves that are set at the looser end of the specs tend to give better/crisper throttle response in the low & mid-range. Gee, I wonder if this is gonna open a major debate . . . Professor '95 KLR650-A9 Federal Way, WA. [USA]

[Denzfeat@aol.com]

Kurt writes: << the mods improved the low and mid-range response...albeit at the sacrifice of top end... >> That's almost always the case with aftermarket exhaust/jetting mods on street bikes. Thing is, most of us run the engines at lower revs on the street; at those speeds the modified engines (assuming proper jetting, etc.) are more responsive and therefore faster. But if you want to run the 1/4 mile or top end or the dyno, stick with the stock exhaust. Pete the exhausted Streak

[TLrydr@aol.com]

I had a cheap cobra pipe, On my last trip to Big Bend the right side plastic side pannel melted, I have the Kaw, saddle bags, I had a welder friend of mine Gut the stock pipe, and welded a end cone that points down ward, I then repainted black, Looks all stock , I picked up about 3 to 4 H/P over the cobra pipe, It has a real DEEP tone. and not to loud. And Kaw is going to replace the side pannels free, Cool. Cheap Mike In a message dated 4/21/00 10:43:45 PM EST, wileyE_@... writes: << anyone have the link to the stock exhaust cutaway? >>

[Jim Hyman]

Wiley, Theory is fine, but what matters is when the rubber meets the road/dirt.  My experience with tuning up hundreds of cycles showed that a good running machine will be pull stronger in the lower/mid range with the valves set MINIMALLY looser than the stock valve spec.  By this I mean if the valve clearance should be .004", I would set the clearance so that a .005" feeler gauge would ALMOST fit.  Most customers don't give feedback to a mechanic (unless there is a problem), however some customers reported comments like "my bike runs better than ...".  There are several books available that deal with 4-stroke performance tuning that deal with the cam- timing modifications that you mentioned.  I've never had the chance to try it myself.  It would be interesting to hear from others that have tinkered with camshaft timing.  Any takers? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Subject:  Re: [DSN_klr650] muffler cutaway and performance    Date:   Sat, 22 Apr 2000 15:24:22 -0000    From:   wileyE_@...  

No debate here professor, in theory anyway. Loose valves equal shorter duration, tight ones longer. I think saw somewhere that the klr cams were ground at 256? I've always wondered about changing the lobe centers by advancing/retarding one of the cams, did it on my ole 1100 zook and it is the big difference between a wr and yz 400 yammie. Anyone daring enough to try it on their klr?

wileyE A6 Olympic Peninsula  

> Generally, if your valves are adjusted to the tighter side of the > speck, this will give you somewhat more top-end power, with a > slight loss of low & mid-range power.  Also, valves that

are set at

> the looser end of the specs tend to give better/crisper throttle > response in the low & mid-range. > > Gee, I wonder if this is gonna open a major debate . . . > > Professor > '95 KLR650-A9 > Federal Way, WA. [USA]

[Chuck MacKarness]

For the road I use little old

>irons that use to come in early Jap tool kits. about 6 inches long and >use whatever for a cheater pipe.

Recently, I used the handles of the box-end wrenches found in the OEM tool kit, they worked fine. --- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Rev. Chuck :^)>+ A13 ...Thousands of smiles and not yet broke in! http://klr650.50megs.com Want my banner on your page? http://www.50megs.com/klr650/pics/RevChucksBanner.GIF ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Send FREE April Fool's Greetings to your friends! http://www.whowhere.lycos.com/redirects/American_Greetings.rdct