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[jasonkop]

Originally Posted by miweber929

I think somewhere along the lne ge aftermarket carb on your bike either was outright sold, or broke and the stock one out back on.

Now there's something that actually might explain some shit.

Other than the elimination of the desmogger and the crankcase breather air cleaner the actual airbox LOOKS stock to me, and unmolested at that. The two holes in the top of the airbox are stock, just like the pic in 5-9 of the manual. So I just drill out those rivets and call it good? I've heard of the desnorkling mod but have never seen it detailed anywhere.

Also, page 1-7 of the manual shows the compression spec to be 92psi at 400rpm. Can you help me on where you got 160-170?

[jasonkop]

just called autozone and they have a comression gauge I can borrow. I already have beer so now i just need ot get off work so i can get cranking. With any luck my jest and airfilter will get here by tomorrow.

[techforlife]

Originally Posted by jasonkop

Now there's something that actually might explain some shit.

Other than the elimination of the desmogger and the crankcase breather the actual airbox LOOKS stock to me, and unmolested at that. The two holes in the top of the airbox are stock, just like the pic in 5-9 of the manual. So I just drill out those rivets and call it good? I've heard of the desnorkling mod but have never seen it detailed anywhere.

Also, page 1-7 of the manual shows the compression spec to be 92psi at 400rpm. Can you help me on where you got 160-170?

Yup,,drill out the two rivets,,pull the snorkle out....


As for the compression,it`s like i said,if you screw in the compression tester,open the throttle,and crank the engine over you should see arround 90 lbs of compression...

But as per the manual,,,if you back off the right side exhaust valve adjustment to at least 0.82 clearance you see the actual engine compression without the decompressor in effect,lowering the reading....


See page 3-9

You do not have the decompressor??????????...if that`s true you just have to do a normal compression test,open the throttle,crank the engine.

Now the manual says you should have 199 lbs of compression,since the decomp is not affecting the compression,because you do not have one...

But........getting almost 200 lbs compression is sometimes hard to get,because rpm is hard to keep up with the small starter....and you are allowed a max difference of 25% in most engines of spec..

What this means is that if spec is 200 psi at 400 rpm..you are allowed as low as 150lbs.......any lower is considered a problem....leaking rings,valves,etc....

This 25% rule is a standard,in actuallity you should get at least 170 or better.......

I f you have a high comp piston this goes out the window,you will see higher readings...just do the compression test and post the results..the aftermarket cam could affect your readings too,,but not much IMHO...

Your readings would have to be awfull low to make it run the way you descibe though......


Brian

[techforlife]

Originally Posted by jasonkop

just called autozone and they have a comression gauge I can borrow. I already have beer so now i just need ot get off work so i can get cranking. With any luck my jest and airfilter will get here by tomorrow.

Hey..........where`s my beer???..i mean geeez i`m sittin here typin and tellin,and my mouth is real dry...

I`m gonna have to buy ,my own again ..which kinda sucks


B

[fritzcoinc]

Damm, I wanted to be on page 1000, 1001 will have to do. PHOTO OP!!!!

[Majolo]

Hi Guys,

I am looking for a Acerbis 22 L fuel tank for my '99 XR 600R.

Any tank available or on-line shp where i can buy it?

Thanks
MJ

[fritzcoinc]

Page 1001 photo op!

[FatherX]

So the good news is:

I replaced the broken bolt... $.54

No extra pieces laying around

SPARK - check

GAS - check

Ignition - sorta

Idle - not so much

Backfire - a bit

LOUD banging inside - check

[jasonkop]

Originally Posted by techforlife

just do the compression test and post the results..the aftermarket cam could affect your readings too,,but not much IMHO...

Yeah, LOTS of variables there. I'm certain the decomp is gone. I'll do the testing and get a result and post that sucker. This should either force me to remove the head or get that prospect out of my mind. Either way its' a step forward.

FADDAH---Damn dude I was just sending good vibes your way....I must have been too late!

[FatherX]

Originally Posted by jasonkop

just called autozone and they have a comression gauge I can borrow. I already have beer so now i just need ot get off work so i can get cranking. With any luck my jest and airfilter will get here by tomorrow.

ooooohh... you mean jeTS

[jasonkop]

Originally Posted by FatherX

ooooohh... you mean jeTS

yes, that twat i meane

[techforlife]

Originally Posted by fritzcoinc

Page 1001 photo op!

Looks like you guys had a lot of fun,,nice ride.........


B

[mcma111]

Jason,

From Dave's Mods:

Important Note: These XR650L carburetor modifications work in conjunction with a free-flowing aftermarket style air filter and removed airbox snorkel. These mods might actually make your bike run worse without replacing the air filter and pulling the snorkel.

[techforlife]

Anyone using a different shift lever,like an MSR or somepin ...????????


I took a pic today of the case saver,,there is no notch,i thought there was .so if an MSR lever will work i`ll get one,otherwise out comes the torches and mig welder..

Anyone runnin a XR`s Only case saver and havev a problem gettin MX boots under the lever


B

[jasonkop]

Originally Posted by mcma111

Jason,

From Dave's Mods:

Important Note: These XR650L carburetor modifications work in conjunction with a free-flowing aftermarket style air filter and removed airbox snorkel. These mods might actually make your bike run worse without replacing the air filter and pulling the snorkel.

I already have a UNI filter, waiting on the new foam cover and it has a supertrapp withy 8 plates. With all those plates I'm thinking that's more surface area than the stock exhaust so yeah I should be putting lots more air though the system and even more when I remove the snorkle.