magneto side spacer???

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magneto side spacer???

New postby jtwest on Mon May 29, 2017 1:30 am

1981TS 185. the diagram linked on this website shows a spacer between the left bearing and oil seal on the crankshaft. So does Rocky mountain's website. my cycle has it between the bearing and counterbalancer as does the photo in my Haynes manual...which is it? the latter makes more sense
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Re: magneto side spacer???

New postby Butcher on Mon May 29, 2017 3:19 am

Share photos as we can see...
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Re: magneto side spacer???

New postby jtwest on Mon May 29, 2017 5:56 pm

thanks for the reply Butcher,

I just started to add photos and realized this website makes it a pain to add photos..Moot point though. I answered my question. I first checked to see how it would work with the spacer between bearing and seal... It wont fit. I then went back through my resources and found that one fiche (Below. also linked on this site) I was going by is used in a lot of publications. However, my Haynes manual clearly states that the spacer indicated goes on the inside.
so the order shown here is not correct
Image
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Re: magneto side spacer???

New postby Butcher on Tue May 30, 2017 12:12 am

Which part? Quote the number.... Below is a higher resolution image... Do you mean part 14 ???

Crankshaft.png



"I just started to add photos and realized this website makes it a pain to add photos..Moot point though."

Yes, yes it does !!
Last edited by Butcher on Tue May 30, 2017 12:12 am, edited 2 times in total.
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Re: magneto side spacer???

New postby jtwest on Tue May 30, 2017 3:48 pm

yes 14. I ordered the spacer when I did not see it in the location in the picture. when it arrived I found the identical spacer on the other side of the bearing...I thought for sure the engine had been assembled wrong. But found in my book that the bike is right. the picture is wrong.
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Re: magneto side spacer???

New postby Butcher on Wed May 31, 2017 12:31 am

Good spotting. I found this in My Haynes manual (worth every cent!)

Spacer.jpg



At some stage I will get crafty (or is that arty?) and edit the microfiche diagram. Clearly it is wrong! I will also endeavor to update info contained on this site to the correct stuff.

Also, I have rebuilt 100 and 125 motors, but not the 185. I own an '83 TS185. At some point I will rebuild and replace crank seals. I have a gasket set for it somewhere that I bought a couple of years ago.
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Re: magneto side spacer???

New postby Butcher on Wed May 31, 2017 4:38 am

Got bored. If I spent more time, I could get it right... I may get bored again!

Crankshaft Bla.jpg



Got to pull me motor down some stage, so don't take my word for it.
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Re: magneto side spacer???

New postby jtwest on Wed May 31, 2017 5:59 pm

looks good to me!!!....the picture from the Haynes was one I was going to post. I have the same Manual and that picture was one of my deciding factors...thanks for your help. I am making progress after years of having it on the bench. I broke my leg a couple months ago so I have a lot more time. Now I am stuck because the gaskets I ordered are the wrong vintage. I have the right ones on the way. the wrong ones are going into the pile of other wrong parts that I need to find a home for...
this has been a learning experience!
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Re: magneto side spacer???

New postby Butcher on Wed May 31, 2017 11:01 pm

"the picture from the Haynes was one I was going to post."

Damn, should of let you do it!


"I broke my leg a couple months ago so I have a lot more time."

That was stupid! Wish you a quick recovery. I try and avoid Hospitals, eh?


"Now I am stuck because the gaskets I ordered are the wrong vintage."

Bugger.



"the wrong ones are going into the pile of other wrong parts that I need to find a home for..."

I have one of those here...


"this has been a learning experience!'

You will get there. Just take your time... Also, take a look at My porting post. I don't claim to know anything about tuning, but with a bit of time, these motors can be improved upon. No idea if things will work better after this but feels good anyhow.

You gonna throw some dual-stage #602 Boyesen reedss at it?
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Re: magneto side spacer???

New postby jtwest on Thu Jun 01, 2017 12:06 am

I'll look at your port post..
. My mom rode one of these in the 80's and my dad said he did something with the ports that was an improvement...For me though, this engine has been wrapped up in towels on the workbench for 2 years. I would love to tinker with it, but at this point I would rather get it back together and get some use out of it first...
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Re: magneto side spacer???

New postby Butcher on Thu Jun 01, 2017 2:26 am

Sweet. Just trim the cylinder base gasket then and remove any dingleberries out of the peripheral boost ports (if any).

Also check cylinder head gasket oil feed hole on the gasket itself to see if it has blocked the hole. This can be very bad if this happens...
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Re: magneto side spacer???

New postby jtwest on Mon Jun 05, 2017 11:13 pm

thanks Butcher..

do you happen to know if there is a "wrong way" to install the gearshift drum? I have the crank case together and I tried to make sure the shifter is working. (yes I know the input shaft has to be turned) It looks like I can get all gears except neutral. but as I recall it is tough to get neutral without the engine running
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Re: magneto side spacer???

New postby Butcher on Mon Jun 05, 2017 11:46 pm

"do you happen to know if there is a "wrong way" to install the gearshift drum?"

Um, not really. Sounds like the drum is turning correctly (freely) and the ability to go from 1st (thru neutral) to 5th is good sign.

Book recommends assembling in neutral position.


Ummm... There will be a dimple in the drum for neutral. On the 125cc engines, the 'detent plunger' (sp) is part of the oil drain bung. It has a spring inside. On my 185, it is separate. There is the plunger and a spring. Ensure that that part is clean and the spring is not bent, although I could not imagine how it could bend.

I find on my 125's/185 that it is easiest to select neutral with my left hand.


Yes turn the flywheel by hand (sparkplug out) while shifting thru gears.


May be the selector forks are forkered (I mean buggered!) They might be worn?


I assume you assembled all the thrust washers for the gear clusters in correct order? I will take a look at the exploded diagrams. I doubt there could be any chance of any errors in them? (tongue in cheek!).

I hope not. Having never rebuilt a 185, I'd hazard a guess... She might just be a bit tight in there...
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Re: magneto side spacer???

New postby Butcher on Mon Jun 05, 2017 11:56 pm

Bent fork shaft? Missing washer / parts in detent plunger? (19, 20, 21, 22). Also check the parts around the neutral switch (31, 32, 33, 34, 35). Missing pin (8). I have no idea what part (9) does?

Click on images for larger image.

Gear Shifting Mechanism.png


Engine Case, Transmission.png


These engines can be a bit finicky selecting neutral...
Last edited by Butcher on Mon Jun 05, 2017 11:56 pm, edited 3 times in total.
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Re: magneto side spacer???

New postby jtwest on Tue Jun 06, 2017 12:21 am

thanks for your thoughts and research.
Part nine is the oddball pin. youd have to see assembly on the 185 to know what I mean. I think I am just overthinking things (same reason this has been taking so long). I didnt think to put the shifter in any particular spot on closing the case (mistake). I had a tough time finding the dentent for neutral when manually turning the drum, but once I installed the shifter and levers the detent appeared in the plunger hole. but still wouldnt "let go" of the gears. which is probably the issue. engine needs to turn (load or oil flowing) to let go. My KTM is similar in finnickyness.
after fretting for some time about my desire to change all bolts to Allen head (female hex...."witches") I decided to go "all out"...I tried the hardware store a year ago to no avail. This time I found all of them plus spares on mcmaster carr. So I am waiting on them now. Then engine is going back in the frame so I can finish it there.....
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