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Old 03-15-2006, 08:37 PM   #1 (permalink)
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Default K&N Air Filter

I'm thinking of changing the stock air filter on my C50 to a K&N unit. If anyone has made the switch please post some info and/or feedback. I also would like to know if there are changes to the computer that need to be made by switching over the air filter only. Please let me know if there is any benefit to making this switch over. Thank You.

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Old 03-15-2006, 11:01 PM   #2 (permalink)
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At the first service I added a K&N aircleaner and a Techclusion FI unit.
I have been happy with the results. I now have 9,000 km on the bike and
like the sound of my stock pipes.

If you are going to service it yourself, keep the stock aircleaner, use while the K&N is drying over night. The recommendation is to place the K&N on top of your hot water tank overnight.
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Old 03-16-2006, 12:14 AM   #3 (permalink)
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I put a K&N on my C50. It seams like there is a slight increase in throttle response. May also be my imagination at work to justify spending $39.00. I didn't replace the factory FI unit. I really don't think you need to for a K&N filter. I have read that guys with carberators have had to rejet. The FI unit seemed to self adjust and the bike runs great. I still have stock pipes and it seems like more air in, better sound coming out. Might be my imagination again. Was it worth it? I think so.

Blackie, did you find an increase in power with the techclusion FI unit?
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Old 03-16-2006, 09:53 AM   #4 (permalink)
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Quote:
Originally Posted by Colorado Cajun
I put a K&N on my C50. It seams like there is a slight increase in throttle response. May also be my imagination at work to justify spending $39.00. I didn't replace the factory FI unit. I really don't think you need to for a K&N filter. I have read that guys with carberators have had to rejet. The FI unit seemed to self adjust and the bike runs great. I still have stock pipes and it seems like more air in, better sound coming out. Might be my imagination again. Was it worth it? I think so.

Blackie, did you find an increase in power with the techclusion FI unit?
Be careful with this.... The K&N will make your bike run leaner. If it is too lean for too long then you will burn your valves and cause major damage. I would recommend that you pull the plugs a couple of times and make sure you are not running lean.
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Old 03-16-2006, 12:08 PM   #5 (permalink)
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C C

I can only give you a seat of the pants opinion, YES.
Better response, smoother running.

I am hoping Atlas68 and I will get out in the valley to swap bikes to see the diff.
Mikemc has a C50SE with some klicks that is stock and Tommy Boulevard has a C50T with low Kms, so when we do get together I will be able to give you a better answer.

Atlas68 has an M50 with pipes.
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Old 03-16-2006, 12:57 PM   #6 (permalink)
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I looked on K & N's site. They don't have a replacment air filter for our bikes, do they? Or are we talking about a complete air intake replacement?

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Old 03-16-2006, 01:17 PM   #7 (permalink)
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Quote:
Originally Posted by Kingby
I looked on K & N's site. They don't have a replacment air filter for our bikes, do they? Or are we talking about a complete air intake replacement?
M50 no, C50/Volusia yes
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Old 03-16-2006, 02:10 PM   #8 (permalink)
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If you want a k&n for your m50 you have to get an airkit...they do not make a filter only for the m50 like they do for a c50.
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Old 03-16-2006, 03:28 PM   #9 (permalink)
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Quote:
Originally Posted by v0lusia
Be careful with this.... The K&N will make your bike run leaner. If it is too lean for too long then you will burn your valves and cause major damage. I would recommend that you pull the plugs a couple of times and make sure you are not running lean.
vOlusia,
Thanks for letting me know that. I love this site, I learn something new all the time. What whould you suggest? Would that be why I get black specks on my turn signal from the exhaust? Or is that normal coming from the exhaust? I will check my plugs and refer to the manual for how they should look. I have about 600 mile with the K&N.
Thanks again,
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Old 03-16-2006, 05:55 PM   #10 (permalink)
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The black on your right turn signal is because of the location of the stock pipes.
I use plexus to clean and protecal to polish.
But to be safe I would check your plugs.
Remember a good shop can remap your bike to correct any lean condition.
Or you may have to install an FI unit.

I had mine installed by a shop, you can do by yourself. There were some good install photos in the M50 section. I printed and took in to my shop.

The box is installed behind my right cover for easy access.
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Old 03-16-2006, 08:22 PM   #11 (permalink)
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The soot in the turn signal is fairly normal with stock pipes. Here is an article I ran across that talks about how to "read" your plugs.
http://webpages.charter.net/v0lusia/Spark%20Plugs.pdf
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Old 03-17-2006, 11:02 AM   #12 (permalink)
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Thanks for the info Blackie and Volusia!

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Old 03-17-2006, 11:55 AM   #13 (permalink)
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I have seen the Techclusion FI unit for as low as $169 USD.
You do not need the harness.
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Old 05-02-2006, 03:09 PM   #14 (permalink)
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Forgive me for beginning what will likely be a flame war, but K&N filters are no good. I've read some bad stuff about them.

Essentially, they flow more air but at the expense of allowing more particles into the engine. What's more, on applications where you already receive more than enough air, allowing MORE air will do no good. Not sure that that specifically applies here, but essentially you are paying for a sound. The money is not worth it. You do damage to your engine and spend more in the long haul on recharging it (which most folks don't do often enough to produce adequate results).

As I said, there have been countless debates over the K&N topic. This is one of the best I've found:

http://www.toyotanation.com/forum/t108237.html

If you want to use a K&N filter, go for it. My experience and the experience of many other out there has been that it's far better to run a paper filter and simply replace it when it's due. You save your engine and your money.

I used to be SOLD on K&N and this thread turned me off completely. Look at the charts and graphs that show particle flows. That alone is enough.

I'm not trying to spark a war and I'm sure I'll get flamed into a 20 ft deep BBQ pit, but at the risk of all of that, I'd like to make sure that this info gets posted so that folks can make their own decision.
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Old 05-03-2006, 03:15 AM   #15 (permalink)
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Quote:
Originally Posted by automogul
I'm sure I'll get flamed into a 20 ft deep BBQ pit.
Sizzle, Sizzle, who's got the KC Masterpiece

The obligatory flame

Looks like toyotanation is still working the "bugs" out of the airfilter debate, common sense dictates, if it flows more air, it most likely flows more dirt also, the one thing that is for sure, many, many, many posts on many forums about the airfilter charge oil building up on the air sensor and causing all kinds of problems in the long run, in many circles it's a common practice to take HP increase claims and slice them in half and your probably closer to the truth
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Old 05-03-2006, 10:32 AM   #16 (permalink)
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Quote:
Originally Posted by v0lusia
Be careful with this.... The K&N will make your bike run leaner. If it is too lean for too long then you will burn your valves and cause major damage. I would recommend that you pull the plugs a couple of times and make sure you are not running lean.


Update: I finally checked my plug after about 1500 miles with the K&N. They looked good.
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Old 05-03-2006, 10:50 AM   #17 (permalink)
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Thanks for being gentle MYC50T. I can respect that.

I'm a performance hog myself. I'm always after bigger badder, faster, and more. I don't think most folks live in an environment where the added dirt will do significant damage during their time of ownership of their vehicles. I'm the type of person that likes to hang on to something for a really long time. I've got a 66 mustang and my first car - an 88 toyota pickup.

To me, it's becoming important to balance power with longevity. On something like my old Mustang, I can rebuild the engine over and over again. I'm happy with doing that. The motor isn't original and the car is over 40 years old now. No sweat. On my other vehicles, I want them to last as long as possible without needing rebuilds and extensive maintainence. That's why I'm going to play it safe and opt out.

I'm going to go for some more radical modifications and stick with the chrome for now. I figure on the performance front, a set of pipes and a new fuel controler will set me strait for a while.

I'm not tripping on those that like K&N. If you like it, use it. I just wanted to make sure that some additional information was available to people who might be asking questions (as I once was). Thanks again for being respectful. Sorry if I'm thread-jacking.
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Old 05-04-2006, 08:23 PM   #18 (permalink)
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Quote:
Originally Posted by automogul
Thanks for being gentle MYC50T. I can respect that.
No problem, the spare ribs were good , I must have gotten that odd ball in the bunch, you know that one in a thousand that just seems to have more power than the average C50, I am just not looking for more power, I have yet to ride with anyone that I couldn't keep up with, yippeee for meeeee!

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Old 05-16-2006, 02:02 AM   #19 (permalink)
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Does anyone know if the K&N filter is available for the c90 and what kind of performance increase to expect...
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Old 05-16-2006, 07:15 AM   #20 (permalink)
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K&N SU-1598 $74.99 at J&P cycles.

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