valve question

[Austech]

Checked my valves this weekend, while doing the major tuneup and fluids. Valve clearance on #1 cylinder exhaust is .0085. Spec is .010. All other clearances were good. Bike has 32000 miles on it. Is this worth getting into the ugly sport of changing shims???
While I'm at it, I guess the fuel filter, which has never been done is due. Honda, or is there a good after market one. Appreciate members opinions.

John

 

[wjbertrand]

0.0085" is below the 0.009" spec. Exhaust valves are subject to burning if their clearance is insufficient. Yes, it's worth digging in to fix it if you plan to keep the bike that is.

Don't know about aftermarket fuel filters for the 1300, but almost any automotive one that will fit in the right space and has the correct size connectors should work for the 1100. In case we are talking about a 1300, I can say that my bike is at 75,000 miles and I have not had to change the fuel filter yet.

 

[willymakit]

How good are you with feeler gauges? 0.0005 is hard to determine for most. I would not go thru all the work necessary for .0005 on only one valve, especially if it were the right bank! only my .02 worth. willy

 

[Mr. BR]

I just realized you guys are on ST13s.... nevertheless, I'm chcking valves on my '95 ST11 and found both exh on #3 to be tight (0.007 and 0.008). Spec is 0.009-11" and since these ARE exhs, I'm going to be very diligent at getting them correct. Btw, my feelers are in full 0.001" increments and that seems to work fine. My first attempt at shims was wrong and found new clearances now at max of 0.011 so I'm going to try again to get them in the middle. Local shop doesn't exchange shims but I was happy they had a decent selection despite the $9 each charge.

Brendan

 

[dbst1300]

"I just realized you guys are on ST13s.... nevertheless, I'm chcking valves on my '95 ST11 and found both exh on #3 to be tight (0.007 and 0.008). Spec is 0.009-11" and since these ARE exhs, I'm going to be very diligent at getting them correct. Btw, my feelers are in full 0.001" increments and that seems to work fine. My first attempt at shims was wrong and found new clearances now at max of 0.011 so I'm going to try again to get them in the middle. Local shop doesn't exchange shims but I was happy they had a decent selection despite the $9 each charge."

Brendan

If you are saying that the exhausts are now at .011...........I would leave them as is. They tend to tighten up as the miles ad up. Every bike I have ever shimmed has been set at the maximum allowed clearance.

 

[WeeSTer]

They tend to tighten up as the miles ad up.

Not always the case as mine loosened a tad on the exhaust side between the 24k and 48k checks. The good news is that they are all still within the specs.
Better a bit loose than too tight.

 

[hojo in sc]

I've been thinking about this post a lot (maily cuz I like to learn), and I suppose there is always the exception to the rule (WeeSter) that the valves tend to tighten up as they get older. I'm wondering what the clearance was in previous inspections. Are the valves getting more loose, tight, or not at all. If it was a LOT looser before, I'm not sure I'd make a minor adjustment to get the clearance to 0.010 for ONE valve.

 

[hojo in sc]

If the valves clearance is getting tighter it might indicate the valves are being raised in their seats by wear

Which is what most of us expect, for them to get tighter. Why is his loose is my question, but more importantly, which way are they TRENDING from previous checks.

 

[wjbertrand]

If I had an exhaust valve set at 0.011, I'd leave it. That's in spec and I figure I won't have to mess with it again for a long time. Though there have been some reports of clearances opening, that has never been my experience in 150K on an ST1100 and 75K on a 1300. They have always tightened for me. I think increasing clearances are the exception rather than the rule.

The ST1100 is a lot easier to access with respect to pulling the cams than the 1300. No cam chain to fiddle with and you can remove the holders for the exhaust and intake cams individually whereas the 1300 has one big holder for both cams.

 

[Mr. BR]

I'm wondering what the clearance was in previous inspections. Are the valves getting more loose, tight, or not at all. If it was a LOT looser before, I'm not sure I'd make a minor adjustment to get the clearance to 0.010 for ONE valve.

My bike has 67K miles on it and I just got it a few months ago. Only service records/receipts I could get only went back a few yrs and about 10k miles so I've no idea on the trend here. All other clearances were perfect except for the two tight exh valves on #3. They're easy to check and adjust and I've got them at 0.011 and 0.010 now and I'll go with that. Engine ran and sounded fine before so this is mostly for peace-of-mind but I am glad to have those two exh back in spec. Btw, it was impressively clean in there and I was suprised how much oil gets pumped up there when I ran the starter a bit (plus those cam bearing covers have oil squirt holes over each cam lobe... nice! I had orignally gone in there to fix what looks to have been a long term leak on the RHS cover so again, it'll be nice to have that cleaned up as well.

Update: I had transposed some of the numbers on my notes for my shop visit (to get shims) but something was just not right upon resassembly. I finally realized my mistake, swapped the shims between the two exh valves and voila!!!! Both now at 0.010", just like all the rest of 'em. Sheesh!!!! Carby sync followed and she sounds great (just like before).

Regards,
Brendan
San Jose, CA

 

[hojo in sc]

40,000 miles and mine were well within specs...never had to touch 'em thus far.

 

[dduelin]

My 1300 has been in spec to last check at 65,000 miles. Some bikes have needed adjustment at far less miles though. I just have to know for myself but I stretch the checks to 20,000 or so miles.

 

[Tor]

Just checked my 05 at 54K. everything in spec, except a few ex. at 8. Rest right on. Gotta shim her.

 

[Tor]

I have seen somewhere on the forum where someone posted a spreadsheet to use to record valve clearences. I know I have seen it, but don't remember where, either Jeff or it might have been Byron. Anyone know where it might be?

 

[George]

Several relatively recent threads about valve checks. Do some searches.

Loosening clearances may be an indication of carbon build up, might be worth running some Techron or such thru a tank then taking another reading.

I've recently done both my STs shims, attempted to put all the valves back to mid-range. After nearly 300,000 miles on the two bikes, this is the first shim changes I've ever had to do. I'm sure both bikes had some changes before I got hold of'em but a first for me. Odd thing is, both required several changes after no changes for a long time. Tight to nominal for each required change, a couple were tight by .003 compared to mid-range, .002 too tight.

 

[gregj]

I have seen somewhere on the forum where someone posted a spreadsheet to use to record valve clearences. I know I have seen it, but don't remember where, either Jeff or it might have been Byron. Anyone know where it might be?

I have a spreadsheet I use to record mine. I cant find the the link here, so I will post it tonight.

 

[dannyk]

Tor, crazykz had a spread sheet for checking valves posted on the site. :biker:

 

[Tankereng]

I have seen somewhere on the forum where someone posted a spreadsheet to use to record valve clearences. I know I have seen it, but don't remember where, either Jeff or it might have been Byron. Anyone know where it might be?

Here's the thread with the ST1300 Valve Clearance Record Sheet

It's in the ST1300 Service Thread...

 

[Old2wheeler]

Thank you! That is a nicely done setup. :hotpepper

 

[Tor]

Thanks for the link. After getting the shims in the other day, I got all ex. valves to 0.010-11. Instead of getting a full Hot Cams set I just ordered a refill set 1.50-1.75, (5 shims each size) which is about half the price. Instead of leaving 0.09 valves, I decided to bring all ex. to 0.010. All intakes were right on. 54K.