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- - Bang-for-the-buck mod ( https://www.xt660.com/showthread.php?t=14474)

Quote:

Originally Posted by stumpydave (Post 134631)

it could be due to my 16 stone sat back on the seat!!!!bigwink

Lightweight !!

Quote:

Originally Posted by stumpydave (Post 134631)

or it could be due to my 16 stone sat back on the seat!!!!bigwink

That's probably it Sherlock :bunny:

Quote:

Originally Posted by nazurro (Post 134627)

Today I fitted the DNA filters and Kev fuel mod, which was a piece of cake. I found it quite cool to turn the knob and watch the temp reading decrease on the dash :)
My only problem was that the air temp sender wire was to short, so I barely managed to get it together, but I'll just have to lenghten one of the wires (solder?)

Before the mod I did some test runs on different gears at certain speeds to try and get a reference.

The biggest improvement I felt was engine smoothness at low speeds, i.e the infamous surgin and throttle jerkiness is so much better. This improvement alones makes the mod worth doing for me.

In the top end I'm not sure I really feel a big difference in power. Mid range there's a better power improvement, in the low range I don't feel any difference.

The only downside of this mod is the air induction sound which I don't really fancy. But was gonna get a couple of earplugs anyway, so that's not a big deal.

So all in all I am pleased: the low speed smoothness improved way more than I had hoped, but the power increase felt less than I hoped for. I did not feel like it wanted to wheelie in 2nd gear. On the other hand, if there is one thing I would like to sort out it was the smoothness issue, and this did it for me.

Kev, do you have some tip how to optimize the fuel setting? I started out with the knob at about 4, then tried myself up to 9 but then it started to feel a bit blurry in the throttle response, and I ended up at around 6, which gives an air temp offset of about 32 (25 degrees in the dash with zero knob setting, -7 degrees in the dash with the knob at 6).

Best thing to do is find the smoothest ridding setting & don't worry to much what the dash says.

I would also recommend you to block off the AIS pipe this will also reduce the intake noise from the airbox.

Quote:

Originally Posted by Kev (Post 134658)

Ok will do, thanks for the advice.

Nazurro....why dont ye run the bike fur what its worth,,, a fun bike that feels like a supermoto,, but really it only has a supermoto T shirt wrapped around it.. its not a full blown supermoto,,,its not quick enough an its not light enough... it does what it says on teh tin..or the manual furthat matter...

the stage 1 an 2 an kev mod will see ye wi more mid range grunt... but C`mon who are we kidding its a heavy weight trail bike wi fat tyres onit.. wi 6000miles services an a comfyish seat, decent lighting an gives ye decent gas consumption... i have had standard xt`s...Modded Xt`s..an its all in the hands o the rider.. the whole thing about these xt`s as so many have said before,, they have grunt an Tourque....the whole shaking about jerkiness is poart an parcel wi the kind of bike that yamaha put out,, they should have been ball wipped fur letting an engine go wi so many hangups in the jerkiness region.... but Hey,, its jist a trail bike...660cc single..ifye want real decent power fae a trail bike or supermoto...start saving an get yersel a Aprilia Dorso duro... or a Husky,, or a KTM.... or jist Rode it like ye stole it,,as it will take all the abuse ye can give it,,,I know I kid not....they are very very hardy engines.... its not about speed,,its about Tourque an Smiles,,, thats it in a nutshell... See Yaa.......

mate im also interested in 'bang for your buck' mods as Im in Asia and most people wont ship to where I am, and If I did manage to get any mod gear sent it would probably go missing in the mail!

I did post a question (in exhausts) regarding fitting straight thru cans (pro-circuit T4's), to the bike and what I would experience from it but didnt get any answers.

My exhaust mods started with removing the end caps and chopping out the small angled pipe. I left about a 10mm 'ring' around the inside of the can to accomodate for the perforated baffle there.

The bike sounded heaps better and 'felt' like it had a little more oomph, but this could be just due to the better sound(?).

anyway tonight I went one stage further. I just couldnt help myself! I removed the end caps again and chopped out 2 of the 3 pipes sticking out of the first plate. the third pipe ran right through to another plate (just before the cat, so i just chiseled around it leaving it intact.

still not happy and having an inquisitive mind i really wanted to look at the cat and try to remove it. so I then chopped out the remaining plate that had the 3rd pipe still connected.

ha- now i could see the cat staring up at me! one of my tools I used to chop out around the plates is a stainless steel rod that i ground down the end to resemble a chisel. I then punched 3 holes about 1/2" round straight thru the cat. the cat seems to be about 4" thick so required alot of pounding with a heavy hammer. I noticed the cats outer ring had moved somewhat so im thinking with some more pounding tomorrow ill be able to remove it completely.

then start on the other pipe.

I did start the bike after punching the 3 holes through the cat and it sounds quite meaty. the way a single thumper should sound.

of course many wouldnt attempt this as they may be in a country where such mods are governed by emission laws and noise restrictions, ha-not me!

anyway I took a heap of pics as I went and will post them to this site (in the exhaust section I presume?) after I complete the exhaust mods and give her a good test run.

next step will be to check out the air filter. I've already removed the snorkel, but will look at the design and maybe have to try to get some filters and the fuel mod at a later date.