DNA Stage 2
 

I've had a DNA filter on the work bench for a couple of months,finally fitted and gave it a run,still has the stock filter and Akra pipes with the baffles in,pick up great mid range even better,but even with the smallest run to 90 on the clock,the motor really got it's nickers in a twist,which showed all the signs of running lean,to the point were it all be cut out,and I had to nurse it home till it picked up after some steady riding.

Now I've been around the block figuratively speaking bike wise so fitted my fair share of filters and Power Commanders,but these symtoms seemed pretty extreme to me with just adding a stage 2 filter or is the norm.

http://www.xt660.com/showthread.php?t=12547

What would we do without richardsracingbonkers and Kev, aye?

Thanks Richard for pointing the man in the right direction :clap: :clap:

Thanks for that,but it's telling loads and yet telling me nothing,I was aware that fitting the stage 2 would lean the bike out,and hence why I didn't touch the snorkel till another day,and I appreciate that to get the bike to run well I'll need a PC,but shorely it shouldn't run that badly on a run with just a stage 2,or do they??

Or am I missing something!!

well ok I'll tell you in a nutshell

[nutshell] When fitting a DNA stage 2 it is recommended to fit a fuelling device, A kev Mod or a more expensive Power Commander. PM Kev for details. [/nutshell]

Thanks,I've encountered bikes running lean,but I guess because it's a single high lighted more,one things for sure the stage 2 is being taken off till I sort something out,thanks again.

yes..you are not reading the end part of the thread...!

In fairness I missed that last bit,sorry don't agree in my case,and I've still got the snorkel on,I've another bike that I ran for years,open cans,filter and induct on par with the stage 3,and got away with it untill I fitted a PC,but this XT ain't going have it,thats for sure.

But thanks for all the replys.

Running your set up at present I would expect the A/F ratio to be around 15:1, which is lean. If the bike runs fine without the stage 2 filter then you would assume that with the stage 2 filter the A/F ratio is to lean.

Do you have a fresh tank of 95 RON fuel in the bike?

I would refit the air box cover & retest to see if the bike still runs fine. If it does you need a fueling device to correct the A/F ratio. If it doesn't then something else is wrong.

The XT produces it's most HP & Torque around 13.2:1.

Thanks again,too be honest the way it stopped yesterday I thought it had burned a piston untill it pickup and fired every other lampost,when I let it settle down and pull it's self together it regained it's composure so to speak.

I've experience this on an Africa twin with a K+N and an open pipe,but nowhere near as bad as this.

The original cover is already back on and plug doesn't look to bad when I took it out and checked when I got back but I haven't ridden the bike with the stock cover back on the weather is crap,but what I'm intrigued about is the fresh tank of fuel,yea sure I'm aware that modern day unleaded goes off pretty dam quick,but surely gone off fuel isn't going to effect it that much,or is the XT less cooking engine than I thought!!!

I had originally thought about fresh fuel and try again,for no other reason I've never known a bike react so badly to just an aftermarket filter,and thats a lot of bikes!!!.