Craigslist Find: Brand-New in Box 83-85 200X Cobra Aluminum Exhaust

[lndy650]

There was a thread years ago about gains on the 200X. Can't remember who did the test(?) Mickey(?)

Dyno runs with a bunch of different exhaust on the 200X. Some had lower HP than stock...

I have heard people putting on a DG pipe and makes tons of power.

ya that doesnt surprise me. as for DG Ive never bought one for an atv because my experience with them on sleds is horrible. just an example the polaris xlt 580 makes about 95 hp stock and has a really bad stock pipe they call it the banana pipe it was how polaris de-tuned their sleds. just about any aftermarket set of triple pipes was a huge gain easily 110-115 hp. the DG triple pipes produced 89 hp! i mean i have no idea how they lost power from the stock single but they did. the dyno was done by dynotech research so its legit. i know its only one dyno but it really turned me off of DG. I mean they must have done no math and just threw together a set of triple pipes.
Old polaris triples were awesome with aftermarket exhaust. the biggest gain was the ultra 680. stock was around 110 i think and decker triples bring it up over 130.

[lndy650]

almost all of the aftermarket silencers for sleds that claim 2-5hp or more actually lose hp. the only snowmobile silencer i would ever buy is Dyno-Port. Rich is about the only honest manufacturer there is. he says its really hard just to maintain the stock hp as far as silencers go.

[Jack G]

There was a thread years ago about gains on the 200X. Can't remember who did the test(?) Mickey(?)

Dyno runs with a bunch of different exhaust on the 200X. Some had lower HP than stock...

I have heard people putting on a DG pipe and makes tons of power.

Rob, I don't know if this is the thread you were referring to, but it contains an article from 1985 where 28 different exhaust systems were dynoed on a stock '85 200X:
http://www.3wheelerworld.com/showthr...-Magazine-Scan

The images don't show up well in the original post so I will just include them here. It looks to me like the SuperTrapp performed the best overall. Cool information for sure, I had no idea there were so many manufacturers making exhausts for the 200X back then. Too bad our options are not this extensive anymore.

[Rob Canadian]

Rob, I don't know if this is the thread you were referring to, but it contains an article from 1985 where 28 different exhaust systems were dynoed on a stock '85 200X:
http://www.3wheelerworld.com/showthr...-Magazine-Scan

The images don't show up well in the original post so I will just include them here. It looks to me like the SuperTrapp performed the best overall. Cool information for sure, I had no idea there were so many manufacturers making exhausts for the 200X back then. Too bad our options are not this extensive anymore.

Nice find. I remembered a different dyno test. I have a '83. List was not that long. Going of my memory. 6-8 pipes. There was not much gain in HP via the stock. The pics provided showed a much advantage in pipes. Mostly down low but a good gain in HP.

[lndy650]

thats awesome i had no idea yoshimura was around back then. sadly they weren't very good back then from the looks of it. the stock pipe was decent especially mid range.


Just make sure you dont do what this guy did. i hate when people gut stock silencers

[3wheellifer]

Rich is about the only honest manufacturer there is.

Rich gets lucky sometimes. Honest is a stretch, but why do you even mention that? Who are you? Yoshi destroyed dynoport as a brand and a manufacturer. The things you say seem to be intentionally persuasive. What comparison does a 2 stroke triple with 100hp have to a 4 stroke single with 15hp? None, is the first thing that comes to mind.

[lndy650]

i was talking about my experience with DG thats why i mentioned the sleds. how am i being persuasive? i was lucky enough to talk to Rich a few times because my former boss knows him and he helped me set up my dragon 800. he is very honest and tells it the way it is. as for yoshimura i love their product and im upset to see their 200x pipe didnt perform. im sorry if i upset you im not really sure what i did wrong. not looking to argue we all have our opinions.

[Jack G]

I had some free time so I went ahead and put the results into an Excel spreadsheet. I then created a rule to highlight the greatest (green) and lowest (red) HP values at each RPM range. It's an easy way to see which exhaust produced the highest/lowest numbers at each RPM range.



I also added an "Average" column just for kicks. It doesn't really prove one exhaust is better than another, but it does represent overall performance across the entire power band.

Side note: I am able to produce dyno graphs of each exhaust. If someone would like to see the graphs for a better visual representation of the data, I'd be happy to post them.

[lndy650]

thats really cool. makes it alot easier to compare them.

[3wheellifer]

Jack G kicks ass he's going to a very valuable member here

[Arky-X]

Nice!

Can you do conditional formatting on each column?
Highlight the column >> Home >> Conditional Formatting >> Color Scales
Select a Green - Yellow - Red scale and that will highlight the higher numbers in green-ish and the lower in red-ish.
Then you can see how each compares across the RPM range.

Cool that you found that article.

[Shep1970]

The fender bolts right up so it must be a 250R fender. I don't think it's an OEM 250R fender though.

As for the forks, I have three sets of 83-85 200X forks and they are all the same length. I have also rebuilt them, and can confirm that the springs and other components measured were within the specifications provided in the shop manual. It may appear to sit a little higher because I have added a 1" spacer to stiffen up the front a bit.

I am 99.99% sure they're 83-85 forks but I am not afraid of being proven wrong. Are there any dead giveaways to tell the difference between the 1st and 2nd generation forks?

Just going back to your fork question for a second- 83-85 200x have steel fork caps
86-87 have aluminum caps, so yes there is an easy way to check. i know your already past this but figured i’d tell you anyway.

Shep

[Bob Smith]

Hello Jack and thank you for the warm welcome. That looks like a really nice muffler you found there. I'm just trying to learn about these atc's but I take it parts may be difficult to find these days. I wonder if there is one like this for my atc 125m but I'm afraid to make it to fast.

[Jack G]

Jack G kicks ass he's going to a very valuable member here

Haha thanks, I've learned so much on here I am just trying to return the favor and offer some good info.

Nice!

Can you do conditional formatting on each column?
Highlight the column >> Home >> Conditional Formatting >> Color Scales
Select a Green - Yellow - Red scale and that will highlight the higher numbers in green-ish and the lower in red-ish.
Then you can see how each compares across the RPM range.

Cool that you found that article.

Yeah Arky I can do that. I used the conditional formatting as you described initially and I thought the color scale made it too messy and hard to interpret. I will play around with it and see if there isn't a better way I can reorganize the data to make the color scale easier to read.

Just going back to your fork question for a second- 83-85 200x have steel fork caps
86-87 have aluminum caps, so yes there is an easy way to check. i know your already past this but figured i’d tell you anyway.

Shep

Thanks for clarifying Shep! I have seen those aluminum caps around and wondered if they were the 86-87 caps.

Not to hijack my own thread but it's my first post in the new member discussion so what the heck. Here is a taste of my fork and fork cap after I did some polishing. Maybe I will do a 'build' thread of rebuilding and polishing forks/caps if there's enough interest.

[ironchop]

Nice work!

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