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Old 03-06-2011, 07:13 PM   #1
Purcell69 OP
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Tell me where this came from (XL350R), I need a Honda Guru

I was changing the kickstart, decompress, and clutch pivot seals on my XL350R today and i found this steel pin attached to the electronic pickup just above the oil pump. The magnetic field in the electronics kept the pin from drifting into the gears in the bottom end. I looked at the exploded diagrams and the inside of the right case but I still can not figure out where it belongs.



The pin is solid steel and appears to have been inserted into something about half its length due to some discoloration. Any of you XR guys have any idea?

-Joe
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Old 03-06-2011, 09:42 PM   #2
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it looks a little like a pressed in locating dowel - like you might find on your kickstart lever near the bolt that holds it on the splined shaft.
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Old 03-07-2011, 07:04 AM   #3
Purcell69 OP
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I'm thinking the dowel may be in the right ballpark. The discoloration was only on one end, about half the length of the pin. The pin itself is just a bit over 1/8" diameter, so it would be a pretty big needle bearing, too big for a motorcycle engine. Also, it came from the same neighborhood as the kick starter, so it may be plausible.

It could be a pin for the carburetor float, other than the discoloration. I've only had the bike now for a little over a week. I bought it from the widow of the original owner, who had just had it serviced and the carbs cleaned at a local chopper shop. Some of the work that was performed was done poorly, so the float pivot pin could have fallen into the crankcase oil fill port, near the pickup coil, but that's a pretty big stretch.

The engine runs smooth and quiet and the oil had no signs of metal or debris when I drained it. Likewise, there were no bits or flakes when I pulled the clutch cover. The cover itself appeared to be the original factory seal from 1985. With just a shade over 7k miles, it should not have had to been opened up unless something had gone wrong, (or the seals got hard from age).

When the factory service manual arrives later this week I may know more.

Any other input?



-Joe
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Old 03-07-2011, 07:24 AM   #4
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Decomp stopper pin?

http://www.bikebandit.com/houseofmot...m9697sch403987
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Old 03-07-2011, 07:36 AM   #5
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Retainer pin for the rocker cover decompressor lever

Or the pin for the cam chain tensioner
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Old 03-07-2011, 09:19 AM   #6
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Quote:
Originally Posted by mcma111 View Post
Retainer pin for the rocker cover decompressor lever

Or the pin for the cam chain tensioner
Yeah i`m thinking the cam tensioner pin......if you can turn the cam tensioner on the outside of the head then remove the valve cover and replace the pin..

B
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Old 03-07-2011, 09:49 AM   #7
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My first thought was it was related to the cam tensioner, but looking at the exploded diagrams, I did not see a dowel or pin, only bolts. (I was wondering what that chrome plug on the right side of the cylinder was. Now I know.)

I will check that here in the next day or so, when I get a chance to work on her again. The cam chain and guides had good tension on them from what I could tell, but that still doesn't rule out the dowel belonging in that system.

-Joe
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Old 03-07-2011, 09:56 AM   #8
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Originally Posted by brucifer View Post
That could be it as well. The decomp in the head is just above where I found the dowel. Looks like I need to check both. The decomp is working like it should. Maybe it was a part lost in a previous service and was not recovered. If I were to bet, I'd have to go with the decomp, given its location and a lack of other damage from the pin drifting around in the crankcase before landing on and becoming attached to the pickup.

-Joe
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Old 03-07-2011, 12:37 PM   #9
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Quote:
Originally Posted by mcma111 View Post
retainer pin for the rocker cover decompressor lever

+1
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Old 03-07-2011, 12:52 PM   #10
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This sucks! I can't tear back into the XL until Wednesday. I really want to get a look now. Looking at the diagram for the valve cover assembly (granted it's not necessarily to scale), it is looking more and more like it came out of the decompress lever assembly.

-Joe
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Purcell69 screwed with this post 03-07-2011 at 01:37 PM
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Old 03-07-2011, 02:28 PM   #11
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Originally Posted by ValveCrusher View Post
I hope the decomp is the 'ticket'..

if not...

the gear selector star wheel has a similar pin in it..

surely it's not...
Hopefully not the gear selector star wheel. If so, I was damn lucky it didn't get caught up in any moving parts. I've put maybe 100 miles on it since I bought it and everything seems normal (even is a little tricky finding "neutral" when stopped, just like I remember.)

-Joe
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Old 03-09-2011, 03:06 PM   #12
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WooHoo! We have a winner! The pin did come out of the decompress lever in the head cover. I did not get it all taken apart today due to the wind (working outdoors), but I did a lot of disassembly to make the job go easier after I get up tomorrow afternoon. After removing the tank and upper motor mount, I decided to remove the decompress cable from the bracket on the head cover, (one less thing to do tomorrow, right?) When I went to slip the cable out of the lever, the whole shaft assembly started to slide out of the head cover. I stopped it from going too far and potentially loosing more pieces into the motor. Obviously, if the dowel was in place, the shaft could not simply slip out of the head cover. Looks like I will be able to put it back in (with some red loctite), and turn my attention to carb jetting.

-Joe
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Old 03-09-2011, 03:26 PM   #13
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Beer

Swell,

I work for BEER

Shall I send you my address?
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Old 03-09-2011, 04:13 PM   #14
Purcell69 OP
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Swell,

I work for BEER

Shall I send you my address?
No problem...your beer is here waiting for you in the 'fridge and Southwest said they will have a seat for you (as soon as you buy the ticket).

Seriously, if you were here right now, there'd be a cold beer in your hand.

-Joe
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Old 03-09-2011, 05:19 PM   #15
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Thanks. Glad I was able to direct you in the right direction.
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