ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-13-2013, 08:17 PM   #6721
bnjgriffin
stoked mostly
 
bnjgriffin's Avatar
 
Joined: Jun 2009
Location: Carmel, CA.
Oddometer: 22
Quote:
Originally Posted by Moparmanpete View Post
Thanks buddy I will check it out, Right now I have some 1/4in fuel line pieces with pantyhose glued to the ends on them.


Edit- the ones that he has listed to vent are the ones I have just covered. I worry about just leaving those uncovered because I was running two fuel filters- the petcock one and a right angle one, and my carbs were just freshly rebuilt and the bowls were still dirty.....WTF
I am not sure what condition your tank is in but I found out that mine had some small rust/flaking inside (way down where it was hard to see) so it just kept sending "small" particles through the filters and these carbs are ultra sensitive so it kept causing blockage until I ended up changing out the tank and recleaning the carbs one last time. Maybe you can run a few cups from your petcock directly into a glass container just to make sure there is nothing getting by?
bnjgriffin is offline   Reply With Quote
Old 01-13-2013, 08:26 PM   #6722
bnjgriffin
stoked mostly
 
bnjgriffin's Avatar
 
Joined: Jun 2009
Location: Carmel, CA.
Oddometer: 22
Thumb

Quote:
Originally Posted by Moparmanpete View Post
Ok gents how loose can I run my valves right now they are at spec .002 and .004 and the other day after a 35mile ride I went to restart it an hour later and the kicker was way too soft. I have NO decompressors hand nor kicker.
On another note I belive it is running lean at highway speeds and getting too hot.
Your valves sound like they are perfect and the kicker does get a little softer when the engine is hot which unfortunately makes it harder to figure out when your'e at the right spot to giver her a kick,

According to my manual, the stock jets are: primary #118, secondary #115, & slow #62. I am at sea level and I have an 87' California model which has all of the emission equipment removed and I changed my jets to 120, 118, & 65. Now she starts with 1-2 kicks every time and runs great even after fully warmed up. In my experience, these bikes seem to like lots more fuel than the stock jets allow.
bnjgriffin is offline   Reply With Quote
Old 01-13-2013, 09:04 PM   #6723
Ghost_Mutant
looking for bionics
 
Ghost_Mutant's Avatar
 
Joined: Aug 2009
Location: border of granite & flats
Oddometer: 704
Quote:
Originally Posted by Moparmanpete View Post
Ok gents how loose can I run my valves right now they are at spec .002 and .004 and the other day after a 35mile ride I went to restart it an hour later and the kicker was way too soft. I have NO decompressors hand nor kicker.
On another note I belive it is running lean at highway speeds and getting too hot.
Ah, here is a good spot to ask a related question. I've been setting my valves to the newer spec used on the XRL: .004 & .005

I had been using the original spec of .002 & .004

Anybody else here with the older RFVC doing the valve spec upgrade?
Ghost_Mutant is offline   Reply With Quote
Old 01-14-2013, 02:16 AM   #6724
RFVC600R
SAND EATER!
 
RFVC600R's Avatar
 
Joined: Dec 2011
Location: SAND LAND
Oddometer: 2,133
Quote:
Originally Posted by Ghost_Mutant View Post
Ah, here is a good spot to ask a related question. I've been setting my valves to the newer spec used on the XRL: .004 & .005

I had been using the original spec of .002 & .004

Anybody else here with the older RFVC doing the valve spec upgrade?

Whats the effect? more engnine noise??
__________________
'83 Honda XL600R 618cc 11:1 Wiseco, XR's Only Exhaust, big tube header, 6 Sigma stage 3 carb mods

RIDE RED!
RFVC600R is offline   Reply With Quote
Old 01-14-2013, 05:13 AM   #6725
Edouard_Bracame
Adventurer
 
Joined: Sep 2011
Location: Bangkok, Thailand
Oddometer: 86
Cylinder Boring

Here's the boring of my cylinder with a Van Norman Boring Bar.



And another XL600LM that I will start to rebuild the engine next summer.

Edouard_Bracame is offline   Reply With Quote
Old 01-14-2013, 06:10 AM   #6726
brucifer
Beastly Adventurer
 
brucifer's Avatar
 
Joined: Nov 2007
Location: Eureka, Ca.
Oddometer: 2,214
Quote:
Originally Posted by Ghost_Mutant View Post
Ah, here is a good spot to ask a related question. I've been setting my valves to the newer spec used on the XRL: .004 & .005

I had been using the original spec of .002 & .004

Anybody else here with the older RFVC doing the valve spec upgrade?
Hey GM. For what it's worth, my machinest guy who knows these (RFVC) engines very well has always said the stock Honda clearance was too tight. I think mainly because of oiling issues but also .002 doesn't allow much for thermal expansion. And we all know these bikes have their fair share of both.
__________________
2005 KTM 525EXC-2000 Buell M2 Cyclone-1996 XR600R-Plated 1995 XR600R-1993 Kawasaki KX500-1984 Honda XL600R/XR650L Hybrid-1984 Yamaha TT600L-1980 Honda CB750F
brucifer is offline   Reply With Quote
Old 01-14-2013, 06:21 AM   #6727
Edouard_Bracame
Adventurer
 
Joined: Sep 2011
Location: Bangkok, Thailand
Oddometer: 86
A clearance of 0.1mm at the intake and 0.12 at the exhaust is OK
Edouard_Bracame is offline   Reply With Quote
Old 01-14-2013, 01:19 PM   #6728
RFVC600R
SAND EATER!
 
RFVC600R's Avatar
 
Joined: Dec 2011
Location: SAND LAND
Oddometer: 2,133
Is there any hard tuned XL600Rs? I'm sure there is.... I want to know what I can do to increase the power without hindering long term usefulness too much. I'm thinking about getting a second job just to tune this beast. Drooling over XRs only parts but do i have other options??

Don't get me wrong, it still wants to wheelie out of turns and has plenty of power, but I want to make this MY bike.

I got to pull the engine to stop the notorious oil leak from the valve cover, might as well make it worthwhile. I can live with a leak for a few more months while i gather parts.

All I know is the receipt from the PO's last rebuild said "WISECO HI-COMP" as one of the new parts listed but it doesn't say the ratio and the PO didn't know either
__________________
'83 Honda XL600R 618cc 11:1 Wiseco, XR's Only Exhaust, big tube header, 6 Sigma stage 3 carb mods

RIDE RED!

RFVC600R screwed with this post 01-14-2013 at 01:30 PM
RFVC600R is offline   Reply With Quote
Old 01-14-2013, 05:37 PM   #6729
Ghost_Mutant
looking for bionics
 
Ghost_Mutant's Avatar
 
Joined: Aug 2009
Location: border of granite & flats
Oddometer: 704
Quote:
Originally Posted by Dracus124 View Post
Whats the effect? more engine noise??
Quote:
Originally Posted by brucifer
Hey GM. For what it's worth, my machinest guy who knows these (RFVC) engines very well has always said the stock Honda clearance was too tight. I think mainly because of oiling issues but also .002 doesn't allow much for thermal expansion. And we all know these bikes have their fair share of both.
It might be noisier but I couldn't tell. My thinking is the same as Bruce. Honda must have changed the clearance specs after real world testing on the early RFVC

Quote:
Originally Posted by Edouard_Bracame
A clearance of 0.1mm at the intake and 0.12 at the exhaust is OK
Right, but I was wondering if its better for longevity with the larger clearances.

0.1/0.12mm are the metric versions of .004/.005in for those of us in the US.

I can't think of a single reason not to use the newer XRL specs, but I was looking for feedback from someone who thought differently.
Ghost_Mutant is offline   Reply With Quote
Old 01-14-2013, 06:56 PM   #6730
Ghost_Mutant
looking for bionics
 
Ghost_Mutant's Avatar
 
Joined: Aug 2009
Location: border of granite & flats
Oddometer: 704


No, I had to wait until after work before I could even check out the new posts on ADV. No posting on the job, big brother and all of that jazz
Ghost_Mutant is offline   Reply With Quote
Old 01-14-2013, 11:07 PM   #6731
Edouard_Bracame
Adventurer
 
Joined: Sep 2011
Location: Bangkok, Thailand
Oddometer: 86
Connecting Rod

Do you guy's have some advise on the two different brands of aftermarket Connecting rod....Hot rod vs Pro-X ?

Wich one would you recommend?

Thanks

Ed
Edouard_Bracame is offline   Reply With Quote
Old 01-15-2013, 04:43 AM   #6732
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 10,869
Pro X

__________________
Steve in SF

BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
mcma111 is offline   Reply With Quote
Old 01-15-2013, 06:35 AM   #6733
Edouard_Bracame
Adventurer
 
Joined: Sep 2011
Location: Bangkok, Thailand
Oddometer: 86
I ordered a Hot rod because there is a copper/bronze bushing at the rod end...Also I just repaired one engine with a Prox connecting rod and the lower end bearing was seized, the cause was probably not the rod itself but when the Honda guy's rebuild the engine sometimes ago, they forgot to install the big washer on the crankshaft left bearing, instead they installed it behind the flywheel outside of the crankcase...not a good idea....

I thinl that the big washer keeps the oil trapped against the left bearing ...but not 100% sure about this.
Edouard_Bracame is offline   Reply With Quote
Old 01-15-2013, 12:29 PM   #6734
Stretchah
Gnarly Adventurer
 
Joined: Oct 2012
Location: London
Oddometer: 117
Hey guys,

Just a quick update re. the work to fix my sunken valve seats etc. The garage called me today and it turns out the head is cracked between the valve seat and the spark plug

They are going to weld the head (apparently it will be like new) and replace all the valves and guides plus a new cam chain rings etc and gaskets and a few other parts i needed to rebuild it, total cost is expected to be around 800 for everything

On the upside at least the barrel just needed a hone and new rings

It is a lot of cash, but, I'm just thinking that at least I'll know that everything is sorted on it then and fingers crossed once It's fixed it shouldn't need to be done again....
__________________
____________________
84 Harris Magnum 2
84 XL600R
85 Vespa PK135
Stretchah is offline   Reply With Quote
Old 01-15-2013, 05:28 PM   #6735
brucifer
Beastly Adventurer
 
brucifer's Avatar
 
Joined: Nov 2007
Location: Eureka, Ca.
Oddometer: 2,214
Nothin' but a bunch a crackheads in this thread.

The stock head on my bike was cracked there too.
__________________
2005 KTM 525EXC-2000 Buell M2 Cyclone-1996 XR600R-Plated 1995 XR600R-1993 Kawasaki KX500-1984 Honda XL600R/XR650L Hybrid-1984 Yamaha TT600L-1980 Honda CB750F
brucifer is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 02:31 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014