Fitting PCV on L0 Wee. Anyone done it? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 5 Old 02-05-2013, 07:53 PM Thread Starter
Join Date: Jun 2012
Location: New Zealand
Posts: 10
Fitting PCV on L0 Wee. Anyone done it?

Am having a Power Commander V fitted to my 2010 Wee next week, from reading everything I can find on this and other sites there doesn't seem to be a lot to be gained but I already have the PCV so it may as well be on the bike as on the shelf. Have any of you guys here done this mod?
I don't race or want every last horsepower out of the bike,the only mods I've done are a K&N air filter and a Scorpion muffler with Staintune headers, I just want it running at it's optimum.
Will post how it goes and my opinion of it in a few weeks. I'm not expecting much but If I could get rid of the low speed 'jerks' right off idle it'd be a big bonus, that's the only fault I can moan about with this bike.
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post #2 of 5 Old 02-05-2013, 08:33 PM
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Location: Morgan, Utah
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I did it on a KLR650...being a thumper, and being a bike I rode in the dirt 95% of the time, it made some sense. Not only is there just one piston pumping up and down affecting the crankcase volume, the valve made it harder for the crancase oil to run through the otherwise completely open hose, directly into the air box, whenever I turned the bike upside down.

Can't say I noticed anything better about it, though...although my bike was one of the relatively few that never burned oil (that I could tell), even when run for long periods over 5000 rpm. 5000 rpm seemed to be a place where many of those KLR engines began to consume oil. Coincidence? Luck? I don't know for certain.
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post #3 of 5 Old 02-05-2013, 09:00 PM
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Re: Fitting PCV on L0 Wee. Anyone done it?

Others might correct me but I don't think the purpose of a PCV is to improve horsepower. Most get fitted to the Vee to improve the throttle response in the lower gears as the fueling is overly lean from the factory for emissions compliance.

I wasn't aware the Wee had any problems with that.

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post #4 of 5 Old 02-18-2013, 11:07 AM
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Join Date: Jul 2010
Location: Newmarket, Ontario
Posts: 58
I just fitted a PCV & auto tune to my 2010 650 (from Blair at SV racing parts) along with a GPR Evo exhaust with front baffle removed.
It all worked straight from the box but you have to follow the instructions to the letter. I read on many forums the biggest problems were caused by not following the instructions (particually the little eol plug essential to get autotune working once fitted). It was amazing to me how many people complained it wouldn't work then discovered the little plug in the box with a sticker saying must be fitted. I noted with mine that it was already fitted so maybe dynojet decided to give everyone a helping hand & make life a little easier for their technical support.

The one thing I have noticed (it is still 27F to 32F here & roads are covered in salt/sand so will not be able to ride it properly for a while yet) that from the limited time I have run it on the stands is that the auto tune adjusts differently when it is in 2nd gear & when it is in neutral at low throttle postions (all I can test for now). I have not set up speed or gears yet (will do once the crap is off the roads) but it seems like the 650 ECU does have gear dependant maps or settings at low throttle openings. Having read numerous threads/posts here and on other forums there is some difference of opinions on exactly what happens through the gears on a 650 (and indeed the DL1000)
The autotune would appear to be working fine as it only adjusts the trim table once set up when I change it from 2nd/neutral. I am going to squirt in a zero mao & let the auto tune do the work in all 6 gears once I can start riding in real world & on the road

Moved up to Suzuki B-King, nothing much beats me at the lights
Still miss my 2010 White Wee

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post #5 of 5 Old 02-18-2013, 12:15 PM
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Join Date: Jul 2010
Location: Newmarket, Ontario
Posts: 58
I should add that the difference was marked when putting bike in neutral, after setting it up in 2nd gear with the rear brake feathering the drive up to 4000 rpm, it wanted to take off -27 in neutral from the map supplied by Blair while in 2nd with light feathering with the brake it wanted -2 the target AFR was 13.2 for this range at 2% throttle.
It also seemed to be a better idle AFR when set up in 2nd and the trims were accepted, once the bike returned to idle where it settled at between 13.2 to 13.5 whereas when I ran it and accepted trims in neutral it idled at 12.4 to 12.8 and made changes right down to 1250 rpm (below the idle speed).

I don't think there is any point in me messing around on the stands any more other than to check that it all worked OK. I am going to try my hardest not to rev the bike in neutral while I have autotune running once I am on the road so maybe I should invest in a switch.

Moved up to Suzuki B-King, nothing much beats me at the lights
Still miss my 2010 White Wee


Last edited by Willow; 02-18-2013 at 12:26 PM.
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