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Discussion Starter #1
I swapped another head onto one of my TW's. I had "hogged out" the exhaust port for better breathing and hopefully resulting in more power, speed and economy. Unfortunately that wasn't the case. It missed badly at WOT and wouldn't go over 60mph. The weather got cold and wet so I put it all away for the last 2 or 3 months.

Flash forward to the present. Dry weather for a little while and slightly warmer temps and I got the TW out. She starts and runs well going up and down the street. She easily wheelies. But head out to the expressway and the miss was still there. I played with the jetting, the spark plugs, I tried a different carb, I drained the gas and put in fresh gas. No improvement. I went to clean the air filter and found this:
P8170062.JPG
I had to fish it out of the garbage for the picture. I replaced with a brand new one. Rotten as could be. How does that happen? Ethanol?

Then I decided to check the camshaft chain timing marks and sure enough the timing was off one tooth. How could that be? I was very careful. I removed the tension thingy and then reexamined things and now the marks lined up. So long story short I moved the chain over one tooth, went for a test ride, and now all is well and I can get back to tuning this TW to beat any 225 or 250 out there. HA HA!

Soooo...... lesson is those marks have to line up when there is tension on the chain, not when the chain is hanging floppy loose.
 

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My filter looked like that a couple of times. Anything other than motor oil seems to eat them up at least for me. I tried [email protected] oil and it ate it up. I currently have a UNI filter. How did that top end run after the new filter and correct timing?
 

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Discussion Starter #3
My filter looked like that a couple of times. Anything other than motor oil seems to eat them up at least for me. I tried [email protected] oil and it ate it up. I currently have a UNI filter. How did that top end run after the new filter and correct timing?
I did use K&N oil on the filter. Maybe that did it. As for running, it ran fine though I think I can lean it out a little bit. I will leave it like it is for now but in the future I am sure I will experiment.
 

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high speed miss? i had a GF like that once...

i hate to admit it, but elime's fancy pants 214cc can take my 226cc to town.
hats off to you tony!
 

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Discussion Starter #5
high speed miss? i had a GF like that once...

i hate to admit it, but elime's fancy pants 214cc can take my 226cc to town.
hats off to you tony!
Thanks Joe.

I thought of your TW -- you never know until you check so take a look at the camshaft timing marks on your bike. Make sure they are right.
 

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No Toil. Been using if for years, OEM filter lasted 6 years and was still OK, just replaced it because it started to tear when wringing it out.

 

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I did use K&N oil on the filter. Maybe that did it. As for running, it ran fine though I think I can lean it out a little bit. I will leave it like it is for now but in the future I am sure I will experiment.
i read a warning somewhere, not to use K&N oil on any foam filters
 

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I've been using the K&N Air Filter Oil on OEM TW200 air filters for years without noting adverse affects. While aware the marketing for this product states it was "optimized" for their cotton pleated filters I was unaware it was proscribed for synthetic filters. The matching K&N air filter cleanser did seem to be linked to a degrading TW air filter once so I discontinued its use.
Thanks for the info. I had assumed the "optomised" was another of those "Buy only our product and lots of it" marketing schemes....like the Youtube video put out by Yamaha where they direct the consumer to use most of a quart of Yamalube 's air filter oil on a single filter.
 
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I've been using the K&N Air Filter Oil on OEM TW200 air filters for years without noting adverse affects. While aware the marketing for this product states it was "optimized" for their cotton pleated filters I was unaware it was proscribed for synthetic filters. The matching K&N air filter cleanser did seem to be linked to a degrading TW air filter once so I discontinued its use.
Thanks for the info. I had assumed the "optomised" was another of those "Buy only our product and lots of it" marketing schemes....like the Youtube video put out by Yamaha where they direct the consumer to use most of a quart of Yamalube 's air filter oil on a single filter.
It could be the [email protected] cleanser but I wasn't going to keep experimenting I just figured I would avoid the pile of crumbs in my intake and use oil. I figured I contributed to the cause some how.
 

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Holy disintegration, speaking of deteriorated air filters, here is my XT200 air filter remains. I knew the filter needed to be replaced after rocky the squirrel stored his seeds in thar but it only took one hard riding year to realize the need for a new filter. Hello, RockyMountain ATV/MC are you open? :p

From a few days ago. I wonder where the rest of the filter has gone.


Before last years riding season.
 

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It looks like you are really riding in the dust. I have wondered if a shop vac filter would work over the filters without choking and making an engine too rich.
 

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That's better than when my Mercedes's heater motor fan chopped a couple of mice's heads off and blew them down the ducting. "Honey, what's that smell?"
 
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HA HA HA! That exact same thing (sort of) happened to my BMW 2002 40 years ago. They got in there, had babies, I started it up after a months storage and roasted the babies (not to mention the poop and pee). After extensive attempts to clean the heater radiator, I sold the car. :mad:

Oh, sorry, I think this is a hijack. ;)
 
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