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Old 04-03-2013, 08:47 AM   #7636
deejay_xr
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Quote:
Originally Posted by elsalvadorklr View Post

ps. my issue was BADLY PITTED (dirt, humid air? saltwater from beach riding? possibly) valve faces and non proper face to seat contact, in other words the valve cutting and grinding performed originally was not up to par...as was what made it worse.
Weird that this would be bad enough to cause almost complete loss of compression from one day to the next

Anyway, good luck !
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Old 04-03-2013, 09:04 AM   #7637
elsalvadorklr
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Originally Posted by deejay_xr View Post
Weird that this would be bad enough to cause almost complete loss of compression from one day to the next

Anyway, good luck !
it wasnt complete loss of compression bud

it was 2 out of every starting cycles I could KICK THROUGH WITH NO DECOMP 1 out of every 3 it would completely SEAL and I could stand on the kicker

valves are designed to rotate, if you notice the rocker tabs are offset on the valve stems in other words they are designed to spin and rotate...how much dont know

my issue was a BADLY missing low end almost electrical like caused by me loosing a seal every so often when the valves rotated and did not contact the seats correctly

If I were to guess I would say that my intakes were sealing at 70% and my exhausts at 50% or less

I did the solvent test and the intakes poured right thorugh!!!!!!!!!!!!!!! but If I rotated them a bit back and forth I could get them to leak less!

so yeah...major leaking valves...

maybe I should quit riding the beach? but what fun is that? or plug up the exhaust and not face the sea when I park the bike? jajajaja
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Old 04-03-2013, 09:37 AM   #7638
deejay_xr
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Alrighty then, that story makes sense

Yeah who knows, the salt in the air probably isn't helping anything atleast

Good luck bud
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Old 04-03-2013, 09:43 AM   #7639
elsalvadorklr
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Originally Posted by deejay_xr View Post
Alrighty then, that story makes sense

Yeah who knows, the salt in the air probably isn't helping anything atleast

Good luck bud
ps royal was right too...I did have the carb too rich...on the needle...this tm38 carb is not as sensitive to major jetting changes like the stocker

again one of the reasons I wanted a cheap wideband sensor setup

the overly rich carb crudded up my exhaust ports and valves(it also overheated a few times) and the pitting is caused by a prolonged rich mixture and carbon deposits...as well as the extra heat...

so I NEED TO JET THIS DAMN THING better! damnit!!!!!!!!!!!!!!!!!!!!!
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Old 04-03-2013, 09:49 AM   #7640
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Originally Posted by elsalvadorklr View Post
ps royal was right too...I did have the carb too rich...on the needle...this tm38 carb is not as sensitive to major jetting changes like the stocker

again one of the reasons I wanted a cheap wideband sensor setup

the overly rich carb crudded up my exhaust ports and valves(it also overheated a few times) and the pitting is caused by a prolonged rich mixture and carbon deposits...as well as the extra heat...

so I NEED TO JET THIS DAMN THING better! damnit!!!!!!!!!!!!!!!!!!!!!
fcr40 all the way
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Old 04-03-2013, 09:50 AM   #7641
deejay_xr
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Yeah an O2 sensor would be the ultimate add-on
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Old 04-03-2013, 10:57 AM   #7642
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1989 xr600
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Old 04-03-2013, 11:10 AM   #7643
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1989 xr600
You just came to gouge our eyes out did you?

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Old 04-03-2013, 11:39 AM   #7644
kubiak
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You just came to gouge our eyes out did you?

lol, no just going through some old pics.
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Old 04-04-2013, 08:05 AM   #7645
elsalvadorklr
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as always KUBIAK

nice bike!

now off to take the cylinder and get it honed and be done with this shhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhit!

peace!
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Old 04-04-2013, 08:10 AM   #7646
deejay_xr
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Originally Posted by elsalvadorklr View Post
as always KUBIAK

nice bike!

now off to take the cylinder and get it honed and be done with this shhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhit!

peace!
Why does the cylinder need to be honed then?

Did you scratch it aswell?
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Old 04-04-2013, 08:15 AM   #7647
joexr
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Originally Posted by elsalvadorklr View Post
as always KUBIAK

nice bike!

now off to take the cylinder and get it honed and be done with this shhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhit!

peace!
You can buy a hone for less than it costs to have it done and youll have it next time. You can never have too many tools.
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Old 04-04-2013, 08:22 AM   #7648
elsalvadorklr
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Originally Posted by deejay_xr View Post
Why does the cylinder need to be honed then?

Did you scratch it aswell?

not really but some grit crumbled off the carboned up combustion chamber and there are some verly light scuffing possibly caused by dirt...or the fact that carbon and grit were falling down into the piston every once in a while

anywhoo steve thought it be a good idea to lightly hone and clean up the piston and rings completely so they have a chance to seat well again

the piston and rings are quite new...
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Old 04-04-2013, 08:32 AM   #7649
deejay_xr
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Quote:
Originally Posted by elsalvadorklr View Post
not really but some grit crumbled off the carboned up combustion chamber and there are some verly light scuffing possibly caused by dirt...or the fact that carbon and grit were falling down into the piston every once in a while

anywhoo steve thought it be a good idea to lightly hone and clean up the piston and rings completely so they have a chance to seat well again

the piston and rings are quite new...
Ah, alrighty then
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Old 04-04-2013, 11:50 AM   #7650
elsalvadorklr
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next stop: CHAIN TENSIONER! ooooooooooooooooooaaaaaaaaaaaaaaaah fun!




after that rocker cover and bam!
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