Author Topic: KTM 640 performance improvement? (Read 1942 times)

Chukudeer · « **on:** August 27, 2007, 02:31:20 pm »

Good day all, I would like to get a bit more performance from my 640 adv. At the moment it is stock and terribly slow, I'm lucky to see 140km/h and it just fades away on slight uphills. Offroad it is ok, but needs a bit more grunt.

Any suggestions will be greatly appretiated.

What pype works the best for this bike? Any other improvements that might help?

Welsh · « **Reply #1 on:** August 27, 2007, 03:04:43 pm »

Hello, Jabu.

Welsh

A lack of self preservation is worth 30HP.

topbox · « **Reply #2 on:** August 27, 2007, 03:07:51 pm »

Posted by: Slimey Posted on: Today at 02:31:20 PM
Insert Quote
Good day all, I would like to get a bit more performance from my 640 adv. At the moment it is stock and terribly slow, I'm lucky to see 140km/h and it just fades away on slight uphills. Offroad it is ok, but needs a bit more grunt.

Any suggestions will be greatly appretiated.

What pype works the best for this bike? Any other improvements that might help?

bushclown · « **Reply #3 on:** August 27, 2007, 03:08:42 pm »

My last steed was a 640

All i did was put an akra pipe on +- R3000.00 and removed the toplid of the airbox and put a DNA airfilter
Also raised the needle and went a bit better

Most i ever got out of her was 165km/h

LostDOG · « **Reply #4 on:** August 27, 2007, 03:11:59 pm »

If that's you in your avatar I think your bike's doing OK.

Chukudeer · « **Reply #5 on:** August 27, 2007, 03:20:40 pm »

Nope that aint me in the avitar

If that was me I'd be riding a Harley

LostDOG · « **Reply #6 on:** August 27, 2007, 03:23:31 pm »

Perhaps get to know "Runner" on this forum. Besides being a good guy, he knows his shi'te about bikes. He might be able to advise you.

Chukudeer · « **Reply #7 on:** August 27, 2007, 03:32:36 pm »

Thanks LastDog, I was wondering if the only real performance improvement might not be a trade in for a 990, is it worth going through all the trouble to try and improve on a bike that was never actually meant to go fast on road but to be very competent off road? Yet even off-road one needs a bit more power some times.

I might just be spoilt with my plastic bike's performance.....

Beemer Man (RIP) · « **Reply #8 on:** August 27, 2007, 03:42:49 pm »

Quote from: Slimey on August 27, 2007, 02:31:20 pm

Good day all, I would like to get a bit more performance from my 640 adv. At the moment it is stock and terribly slow, I'm lucky to see 140km/h and it just fades away on slight uphills. Offroad it is ok, but needs a bit more grunt.

Any suggestions will be greatly appretiated.

What pype works the best for this bike? Any other improvements that might help?
Yes I can help!! SELL THE BIKE!!

Chukudeer · « **Reply #9 on:** August 27, 2007, 05:15:07 pm »

Thanks Beemer man, was it you on the scarred GS I passed coming down Breedts Nek on Sunday? Found some parts lying about at the top........

Thing is, the KTM 640 is just so much fun off road.....

Leo · « **Reply #10 on:** August 27, 2007, 07:57:51 pm »

I'll go for the pipe and the air filter option, as already suggested. Is the biked tuned optimally ? 140 does not sound right, unless you weight something like the oke in your avatar

You could also play with the sprocket, that's a win / loose combo, either you gain speed and loose power, or visa versa.

If all else fails put a BMW sticker on the side

or even better a WD sticker top go flatout

Runner · « **Reply #11 on:** August 27, 2007, 09:03:58 pm »

The best single improvement one can make to that bike is a Keihin FCR 41 carb and then a pipe .Ihave had poor results with DNA filters they clog quickly offroad and then the bike does not run at all .640 is much better offroad than 950/990(offroad not dirt road.

Nardus · « **Reply #12 on:** August 28, 2007, 08:02:36 am »

Agree, not much you can do. Best is a free-flow pipe and maybe 1 (or 5) up on the jets if you mainly at coast. Take snorkel off. Otherwise, you spending money on bling and that engin is likely to pack up if you fiddle too much.

I would strongly suggest that you get yourself a EXC250 or 300 or even 450 for the offroad and a 950 equivelant for riding over 140kmph.

letsgofishing · « **Reply #13 on:** August 28, 2007, 08:06:57 am »

Have you searched the ADV riders forum? - there's a ton of info there!

Chukudeer · « **Reply #14 on:** August 28, 2007, 08:08:08 am »

Thanks Runner, I'll be having a chat to the people at The Roost as well, see what i can do about getting a bit more out of the bike, where might I get my hands on a carb as suggested? And what pype would you suggest? Akrapovic?

Nardus, I have a Beta 525 for offroad play, awsome monster. That might be why I feel the KTM is a bit lazy. The Beta will outperform the KTM from start to top end without a problem. I also have a WR250 that I recently put a FMF pype on and had a jet kit done, the differance is amazing on the small 250. I was hoping for a similar result if the same could be done to the 640.

Beemer Man (RIP) · « **Reply #15 on:** August 28, 2007, 09:09:18 am »

Quote from: Slimey on August 27, 2007, 05:15:07 pm

Thanks Beemer man, was it you on the scarred GS I passed coming down Breedts Nek on Sunday? Found some parts lying about at the top........

Thing is, the KTM 640 is just so much fun off road.....

Ah! the man who did'nt wave back

yes Twas mee!

Runner · « **Reply #16 on:** August 28, 2007, 09:14:06 am »

That Beta has a FCR fitted just fit that one for the weekend ,the jetting will be fine , then you can see or feel the difference.Those motors are reliable a pipe or carb will not affect reliability.With the stock carb leave the snorkel in rather take off the cover in the airbox cover,those thing are sensitive where the air comes from.It will never run like a 525, those 640 motors are 20 years old.

Runner · « **Reply #17 on:** August 28, 2007, 09:20:57 am »

Akra pipe is the only one.Where did you get the Beta from?Ralph?Rather speak to him than the Roost.

Kamanya · « **Reply #18 on:** August 28, 2007, 10:30:27 am »

Hang in there, the 690 Adventure will be coming out next year. May see it at the Paris bike show.

That engine is aparently a goody and it is fuel injected.

Chukudeer · « **Reply #19 on:** August 28, 2007, 11:35:02 am »

Sorry Beemer Man, very rude of me,

I do appologise for my rudeness