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2,666 Posts
Oops. Over 72k now and I still have never done this. :nutkick:
15K Valve Adjustment
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I know this is an old thread but you high mileage guys better check!! I'm at 24k miles & mine are way the F tight!! Can barely get the .1mm in the intakes & the exhausts are about .15mm. Damn I'm surprised she was running at all. Is Hot Cams a decent kit? Says theyll fit my LTZ400 quad too.
The exhausts will be tight after that many miles, especially if they haven't been done before..... and yes, 3 of your inlets are on the edge now.
So, if you are doing them, it will be very helpful to have a micrometer to measure the installed ones, so you know which way to head with the
new shims. Digital verniers may be ok, maybe.
So, if you are doing them, it will be very helpful to have a micrometer to measure the installed ones, so you know which way to head with the
new shims. Digital verniers may be ok, maybe.
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5,270 Posts
Those measurements are not too bad. Pretty typical in n my experience over time. By the book, you only have 4 valves under spec. With the clearances shown, bike should be running decent overall. In an SV1000 street engine you will start to have noticeable hot running issues when the the intakes are 0.05mm and below and when the exhausts are at 0.13mm and below.
This by no means to keep running an engine with under spec valves, this is just my observations after works on mountains of TL/DL/SV1000 engines.
These bikes use the 9.48mm diameter shims, yes same as your LTZ. The HotCams kits work fine.
Good thing you are checking though!
-ms
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117 Posts
Ok thanks guys! I was checking with the cams straight up as I have the magneto cover off so can't really line up the FT, RT marks. But I looked up the pics in the manual & then the readings were a bit better. Shes been running great but glad I'm getting to this stuff finally. Grabbing a better torque wrench, mine doesn't go below 20 ft lbs & yes ordered the hot cams kit.
Magneto cover gasket seems ok, maybe add a little grey rtv?
Magneto cover gasket seems ok, maybe add a little grey rtv?
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5,270 Posts
Oh, and when I get a bike like this, I will often reshim the in spec valves into middle of range. It is so easy on these bikes.
It then makes the next inspection a quick check and done.
-ms
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117 Posts
Thats what I'm thinking. Should the exhaust be closer to .30 mm? Will it continue to get tighter or will it stay about the same now?
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I typically target 0.15-0.18mm on the intakes and 0.25-0.28mm on the exhaust. That way if your target shim is slightly bigger or smaller or your initial measurement was a bit out, you are still in a happy spec range.
As the valve face and valve seat wear with time the clearance will get smaller. But also note as the bucket wears and the shim can wear also that the clearance will get bigger. Just check on the scheduled interval.
Also, note that if the next time you check, if the same valves are all tight again, you might be guttering the valves out and you might need to service the heads.
-ms
Obviously the bike isn't able to be run just yet ?
Is it worth waiting until you can start it....then get her hot.....the heat gun will be ok, but not as good as the engine heat.
That being said, they can be a bitch to get out.
Is it worth waiting until you can start it....then get her hot.....the heat gun will be ok, but not as good as the engine heat.
That being said, they can be a bitch to get out.
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117 Posts
Got it!! PB Blaster & a heat gun!! And yes rocking sideways definitely was the ticket. Ok im the homestretch now hopefully. Glad I picked up a small torque wrench. Hard to guess between 7-10 ft lbs. That bitch was coming out today one way or another
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117 Posts
Hey guys, is this anything to be overly concerned about? Was so happy to get the throttle bodies off but looking inside the intake valves are quite carboned up. I don't overfill the oil & she has always gotten great mileage (45-50 mpg). Maybe a result of tight valves?
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5,270 Posts
That can be a result of several things.
Low combustion temperatures
The fuel being used
Valve/valve seat leakage
It is hard to tell if it is a big issue or not, but I would probably start running some fuel system cleaner through it and try to see if it cleans up.
Another good cure is to take it to a track day and ride it like you stole it for a day. Then inspect again.
-ms
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117 Posts
Yea I admit between gas prices & knowing the valves were probably tight I had been babying her lately. Definitely plan out running her hard after all of this. I like seafoam, do u recommend anything else? I have some intake cleaner I've used on my Jeep. Not sure where I'd wanna spray it in on the SV while its running.
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5,270 Posts
SeaFoam, K100 are what I like.
-ms
-ms
Honestly, the difference between going hard and farting around on these things is pretty minimal, in my experience anyway.... maybe over the tank 1/2 a litre at worst.
at $2 a litre average for 98 (x that by 3.87 for your gallon) its a dollar more.
I had to be nice with my lience for 6 months (i was naughty and had a 1 point licence) and over that time the bike wasn't happy.... as soon as i had a fll 12 points back i gave her
a flogging for a day and she loved it.....
Wow, 50 on a US gallon, that is some mega-miling! I struggle to get more than 45 on an imperial gallon here in the UK (20% larger volume) and that's when I'm riding like a vicar.
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117 Posts
I'm always reading about poor mileage on these forums. Mine has always gotten good mileage. My Electra glide is a different story, people on those forums claim 50 mpg & I find that hard to believe on a 900 lb bike. I'm lucky to get 37 mpg but I know the PO has it tuned rich. It doesn't run super hot though like Harleys are known for.
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