Valve adjustment

santa · Post by **santa** » Wed Sep 24, 2008 8:28 pm

I need to do a valve adjustment to my 06 Blur.

Is there a "how to" thread somewhere here for the Blur?

If not can someone at least tell me:

-What is the valve clearance for the intake and exhuast valves and

-How do you tell the difference between the two.

I haven't done a valve clearance since I owned Toyota Corona in the late 70's so a little guidance would be very helpful.

Thanks.

charlie55 · Post by **charlie55** » Wed Sep 24, 2008 11:51 pm

According to the PGO GMAX service manual I have, both the intake and exhaust should be set to 0.08 mm, cold. Since the clearances are the same, you really don't need to know which valve is which, but just as an FYI, the upper valve is the intake, the lower is the exhaust.

Did mine at 500 miles and both were pretty much spot on. Will probably re-check at about 2000 - 2500 miles.

jim_0068 · Post by **jim_0068** » Sat Sep 27, 2008 1:31 am

People gave me flack about this before at a different site but this method works FINE.

Turn the motor over until one valve is completely closed, then adjust the other valve which should have clearance to the recommended clearance.

Then turn the motor over again until the valve you just adjusted is completely closed, then adjust the other valve which again should have clearance already to the recommended clearance.

Also please be aware that as you tighten down the valve nut, the clearance can tighten up a bit. So it might take a little time to figure out how to do it right. There should be a SLIGHT resistance when measuring; shouldn't be super tight and also shouldn't just slip right; just a slight resistance.

santa · Post by **santa** » Thu Oct 30, 2008 10:34 pm

After doing the first valve adjustment apparently adjusted them too loose, I could here it. However, the positive side was that the scoot had a lot more power at higher speed while losing some in the 0-30 range.

I did a second valve adjustment. This time I notice that space being adjusted is slight lower that the surrounding metal so it would bow my measuring tool. This caused me to adjust them too loose the first time.

This time they might be slightly tight, but it is running the best ever.

I notice that I do have a slight vibration at 64-67, but after that it seems to hum up to about 73(indicated).

I think I am going loosen them up just a bit, to see it that makes it even smoother.

jfrost2 · Post by **jfrost2** » Thu Oct 30, 2008 11:42 pm

There is one for the buddy in the general forum. The process is nearly the same for all bikes with just 2 valves. Getting to the valves is much different since the body panels are different on the buddy and blur. How long did you adjustments take?

Lostmycage · Post by **Lostmycage** » Fri Oct 31, 2008 3:21 am

Valve adjustment doesn't take long at all, once you can get to it. Pop the seat out, open the valve cover, slip a 14mm socket into the fan shroud to turn the motor (easiest way possible) and use a mirror for checking the alignment marks.

You can get to the valves from underneath the bike (I removed one of the lower panels, can't remember which one) or from above. It is a feeler gauge after all. Total time should take about 30 minutes if you're not paying attention or triple checking, start to finish.

The 14 mm slipped into the fan shroud is a guess. From all recollection, it should fit fine, I just haven't tried it myself... I removed the fan shroud to find out which size it was. The 14mm 6-point socket is confirmed though, as I used the same when I did the valves on my Blur. Just be sure it's a 6 point socket so you don't strip the plastic on the fan.

babblefish · Post by **babblefish** » Fri Oct 31, 2008 4:21 am

jim_0068 wrote:People gave me flack about this before at a different site but this method works FINE.

Turn the motor over until one valve is completely closed, then adjust the other valve which should have clearance to the recommended clearance.

Then turn the motor over again until the valve you just adjusted is completely closed, then adjust the other valve which again should have clearance already to the recommended clearance.

Also please be aware that as you tighten down the valve nut, the clearance can tighten up a bit. So it might take a little time to figure out how to do it right. There should be a SLIGHT resistance when measuring; shouldn't be super tight and also shouldn't just slip right; just a slight resistance.

If one does it the way you described, wouldn't the opposite valve (the one you say should be checked/adjusted) from the closed one, be all the way open? And if so, you would have no clearance at all since the rocker is pushing the valve open.

Lostmycage · Post by **Lostmycage** » Fri Oct 31, 2008 5:03 am

I adjusted from Top Dead center.

The other way works, but can be confusing if you don't pay attention to what you're doing. Even damaging. The trick is, on the cam gear, there's two "ticks" and two holes. I think jim_0068 means to rotate the engine till one hole is lined up with the casing, adjust the closed one, then line up the opposing hole.

Keep in mind, this is all from memory for me. Hopefully I'll have my Blur back soon to check and measure till my heart's content. Hopefully.