The XL600 thread - Page 470

Carter Pewterschmidt · 03-04-2013, 03:45 PM

Quote:

Originally Posted by davek181

I stand corrected. I pulled the bowls off both the remaining XL carb sets I have one is a ph 68, and the other is a ph 64. both have the screw type jets. I guess I never paid much attention since I was always dealing with my xr carbs and hex jets with screw off covers. By the way, the jet projection you show on the hex jet is very close to what I am used to seeing. You can just get a wrench on it to change it.

That's why I changed out the bowls. I have changed jets on the standard XL carbs without removing the carbs from the bike, but it's a bit of a pain taking both the bowls off. With the XR5 bowls it looks like it's just drain the bowl, unscrew the cap, and get a little ratchet on the jet. You're post about your XR carbs inspired this mod actually.

As for the the PH64 carbs, I haven't come across a set of those yet. Someone did a write up of XL carbs in this thread somewhere and I think those ones were from a California model.

Carter Pewterschmidt · 03-04-2013, 03:48 PM

Quote:

Originally Posted by brucifer

I see another poster answered already but here's what I came up with.

That's basically what Davek posted, so that shows that the springs both of you measured are likely to be original springs. Thanks again!

m2h · 03-04-2013, 04:42 PM

Quote:

Originally Posted by davek181

I get my jets from jetsrus, I just looked at their site and they have a listing by make and model. The listing for xr/xl 600 lists the proper slow jet, but they show the wrong main jet. There are basically two main jets, the hex head and screw head. My XL has XR carbs but the jets are the same hex head. Look in XR600 93- on listing and they show the right jets for hex application I believe. Measure to be sure though.

I looked up the crancase gasket and got 11191-MN1-700 for a part number. I looked it up on Babbits onlne and they show a price of just under $14.00. Your local dealer may be able to get one too.

Thanks dave Have got it sorted now. From what you said i had a bit of a brain fart!!!

Got the jets out and found the actual jet is screwed into the hex head part DUH!!!

As for the gaskets i'll have to have look at Babbits, havent used them before.
Thanks again mate!
M2H

m2h · 03-04-2013, 04:47 PM

Quote:

Originally Posted by Carter Pewterschmidt

All XL carbs I've seen use the standard slot type Keihin jet. They are the 99101-393 type shown here on the site I purchase jets from. It's a standard street carb style jet. The same as were in my ZR550 Kawasaki. On this page they're the forth one down the page.
http://www.pjmotorsports.com/keihin-jets.html

The XR carbs with the quick change float bowls use the hex type jet shown as 99101-357 on that same site. Sounds like you may have those.

Thanks Carter i think i have it sorted
Cheers
M2h

RFVC600R · 03-04-2013, 06:30 PM

Quote:

Originally Posted by ElMartillo

.

Now to see how the new fork oil and steering bearings affect the handling in the dirt!

Cheers all!

What weight oil did you use? I used 15w with new seals and I can blitz huge whoops as long as my legs dont get tired.

ElMartillo · 03-04-2013, 10:19 PM

Quote:

Originally Posted by Dracus124

What weight oil did you use? I used 15w with new seals and I can blitz huge whoops as long as my legs dont get tired.

I had a quart of ATF sitting around, so that's what I used. Thrashed the bike good today as a shake-down, the front is like new, with the biggest improvement being the steering bearings. The old, loose, notchy ones made it feel like I was steering with both wheels! Should get my new front tire in mid-week, I hope to have the oil leaks buttoned up by then.

This XL is a hot rod, and feels like a minibike compared to my 1150GS. What a blast!

Cheers!

RFVC600R · 03-05-2013, 04:25 AM

Hell yeah the XL is an amazing motorcycle. I've been climbing hills I never thought possible since I got the 13t sprocket. This damn bike will climb anything now.

R. Smith · 03-05-2013, 04:10 PM

Here is my 1984 xl600r, bought it about 5 months ago w/18k miles. Has fresh oil and i loosened up the banjo bolt to be sure about oil getting to the head. Got it running and heard this coming from the engine. I may be wrong but the rattling does not sound normal. I took the engine apart to fix some stripped bolt holes and did not find any major wear or damage. It made this noise before and after I had the engine apart.

Read that it could be a worn out cam chain or cam chain tensioner.

Ideas?

http://youtu.be/aUZS_dNEaPs

davek181 · 03-06-2013, 06:32 AM

Quote:

Originally Posted by Carter Pewterschmidt

That's why I changed out the bowls. I have changed jets on the standard XL carbs without removing the carbs from the bike, but it's a bit of a pain taking both the bowls off. With the XR5 bowls it looks like it's just drain the bowl, unscrew the cap, and get a little ratchet on the jet. You're post about your XR carbs inspired this mod actually.

As for the the PH64 carbs, I haven't come across a set of those yet. Someone did a write up of XL carbs in this thread somewhere and I think those ones were from a California model.

I don't know for sure what they fit, they were eBay finds that went cheap enough for me to buy for parts. They are the style that has the fuel screw on the downwind side if the slide. My bike is a cali model that came to me with XR carbs and canister removed already.

I hate to remove the carbs. I have evolved techniques to replace jets, slides, change needle position and jets and emulsion tubes etc. with the carbs in place. The only part yet that I could not do in frame was the decel diaphragm.

I hope most of that is behind me now as I have finally gotten it dialed in as close as I think I can get it. I can adjust for seasonal changes with main jet swaps which are easy with the screw off bowls.

crobox · 03-06-2013, 06:55 AM

I've been riding my newly rebuilt XL a bit over the last week or so, as the weather has been a bit nicer around here.

One thing I've noticed is a fair bit of "coughing", or extremely short intervals of power loss, frequently during cruising at a constant speed/engine RPM. Usually stops happening if I open the throttle, although it sometimes continues to happen during the very first bit of throttle opening.

I am thinking this may be a result of too-lean jetting. Does that make sense? The carbs were thoroughly cleaned as part of the rebuild, so I don't think it's a result of general carb dirtiness or clogged orifices.

Thanks,
Christian

crobox · 03-06-2013, 07:02 AM

As a reminder:

I have the stock jets, but I'm up at 7000 ft. altitude.

Thanks!

doc.heckle · 03-06-2013, 07:47 AM

Mr smith, sounds like tappets are a little loose to me

Tim

R. Smith · 03-06-2013, 08:03 AM

Quote:

Originally Posted by doc.heckle

Mr smith, sounds like tappets are a little loose to me

Tim

Checked the tappets, they are torqued down. Sounds like valves need adjustment but I just set them at specs.

Carter Pewterschmidt · 03-06-2013, 08:06 AM

Quote:

Originally Posted by crobox

As a reminder:

I have the stock jets, but I'm up at 7000 ft. altitude.

Thanks!

Your pilot jet is probably lean. What size one were you running?

davek181 · 03-06-2013, 08:07 AM

Generally if it is surging a little, that is a sign of leanness. What jets are you running exactly? 7K elevation is roughly equivalent to one notch richer on the jetting from my experiences.

These were lean to start with at best. Easy enough to pop the bowls and look. Can be done on the bike with a short screwdriver or bit in an offset driver.

03-05-2013, 04:25 AM	#7042
RFVC600R SAND EATER! Joined: Dec 2011 Location: Twentynine Palms Oddometer: 477	Hell yeah the XL is an amazing motorcycle. I've been climbing hills I never thought possible since I got the 13t sprocket. This damn bike will climb anything now. __________________ '83 Honda XL600R valve seat RIDE RED!

03-06-2013, 06:55 AM	#7045
crobox Gnarly Adventurer Joined: Nov 2012 Location: Taos, NM Oddometer: 196	I've been riding my newly rebuilt XL a bit over the last week or so, as the weather has been a bit nicer around here. One thing I've noticed is a fair bit of "coughing", or extremely short intervals of power loss, frequently during cruising at a constant speed/engine RPM. Usually stops happening if I open the throttle, although it sometimes continues to happen during the very first bit of throttle opening. I am thinking this may be a result of too-lean jetting. Does that make sense? The carbs were thoroughly cleaned as part of the rebuild, so I don't think it's a result of general carb dirtiness or clogged orifices. Thanks, Christian __________________ Current Bikes: 1986 Honda XL600R, 1988 Hondasuki KLNX250R, 1988 BMW R100GS (dead) Previous Bikes: Honda XL250 (2 of them), Honda XL600R, Kawasaki KLR600, BMW K1100LT, BMW R60/6, BMW K75, Husqvarna 430XC Click HERE for my Cummins 4BT International Scout build thread www.christianristow.com

03-06-2013, 07:02 AM	#7046
crobox Gnarly Adventurer Joined: Nov 2012 Location: Taos, NM Oddometer: 196	As a reminder: I have the stock jets, but I'm up at 7000 ft. altitude. Thanks! __________________ Current Bikes: 1986 Honda XL600R, 1988 Hondasuki KLNX250R, 1988 BMW R100GS (dead) Previous Bikes: Honda XL250 (2 of them), Honda XL600R, Kawasaki KLR600, BMW K1100LT, BMW R60/6, BMW K75, Husqvarna 430XC Click HERE for my Cummins 4BT International Scout build thread www.christianristow.com

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03-05-2013, 04:10 PM	#7043
R. Smith n00b Joined: Oct 2012 Location: Vista, California Oddometer: 7	Here is my 1984 xl600r, bought it about 5 months ago w/18k miles. Has fresh oil and i loosened up the banjo bolt to be sure about oil getting to the head. Got it running and heard this coming from the engine. I may be wrong but the rattling does not sound normal. I took the engine apart to fix some stripped bolt holes and did not find any major wear or damage. It made this noise before and after I had the engine apart. Read that it could be a worn out cam chain or cam chain tensioner. Ideas? http://youtu.be/aUZS_dNEaPs

03-06-2013, 07:47 AM	#7047
doc.heckle Adventurer Joined: Jan 2007 Location: UK Oddometer: 38	Mr smith, sounds like tappets are a little loose to me Tim

03-06-2013, 08:07 AM	#7050
davek181 Gnarly Adventurer Joined: Aug 2007 Location: Idaho Oddometer: 164	Generally if it is surging a little, that is a sign of leanness. What jets are you running exactly? 7K elevation is roughly equivalent to one notch richer on the jetting from my experiences. These were lean to start with at best. Easy enough to pop the bowls and look. Can be done on the bike with a short screwdriver or bit in an offset driver.