+2mm Throttle body
 

Just got my spare throttle body bored out +2mm from 44mm to 46mm.

It was sent to the USA to KDS racing, where Kenny bored it out for me. Kenny specilizes in the Raptor motors. It was bored +2mm with a new throttle plate which is thinner & the spindal was machined thinner as well. Flow testing on other +2mm throttle bodies showed (flow bench tested 270.1cfm stock- 294cfm modified) so more air should = more HP. I will have to reset the PCIII to get the Air/Fuel ratio right.

The detail can be read here. http://www.bluetraxx.com/reviews/kds_throttlebody.htm

Kenny's web page. http://www.kdsracing.com/ Kenny provides fantastic service, with only a few days turn around & posts to anywhere in the world.

I will get my bike on the dyno in a few weeks time with a before & after dyno run.

http://i201.photobucket.com/albums/a...rottlebody.jpg

http://i201.photobucket.com/albums/a...evxtx/46mm.jpg

http://i201.photobucket.com/albums/a...evxtx/48mm.jpg

Looks like a SU :coolsmiley: I guess the theory is the same. If so another mod that was done on the SU was to thin the leading edge of the butterfly? and to locktite small countersunk screws to hold the butterfly in place providing a flatter surface. :048:

What is beyond the butterfly?? :icon_scratch:

Look forward to seeing your dyno results.:SpinHappy_15XK8L:

Some more photo's

http://i201.photobucket.com/albums/aa202/kevxtx/bb.jpg

http://i201.photobucket.com/albums/a...evxtx/aa-2.jpg

http://i201.photobucket.com/albums/a...evxtx/cc-1.jpg

http://i201.photobucket.com/albums/a...evxtx/dd-1.jpg

http://i201.photobucket.com/albums/a...evxtx/10-5.jpg

Grande Kev :041::041::041::041::041:

If anyone else wants to buy another throttle body to send to this american company where Kev sent his to be modded I have a spare one for sale, having 2 will give you the possibility to swap them in case you want to change it back to normal one day.

PM me for price and details it includes a TPS and all fittings.

Please also note I still have 2 engines one full, one in bits minus the barrel and valve head, so if anyone needs another top end to be sent away for modding to 700 you can buy the whole spare set from me.

pm sent

So you can fit a 700 barrel to the XT, is a 700 Raptor engine a straight bolt in replacement, because damn you can get some good stuff for them.

Well it's not as straightforward as one might think.

If you read the 700cc conversion thread that Kev did to his bike, you will see why, follow this link, please: http://www.xt660.com/showthread.php?t=5895

Whilst the Raptor part will slot in, there are some modifications that need to be carried out because some of the routings don't match, and if you don't have access to routers and accurate instruments in order for you to be able to tap holes and redrill others then your best bet is to get an XT top end and have it rebored.

Yes, have seen that. What I was getting at is, can we do a straight bolt in replacement with a whole Raptor engine and box.

Oh I see what you mean now, we need to ask 2 people, one is of course Kev and the other is Freez, who actually mods Raptors for races, I am not sure if the engine mountings *(frame mountings that is) will match as the raptor frame is obviously different from the xt.

I asked Kev why he didnt do a str8 swop on the engines when he 1st started that thread on the 700 convertion and he said the engine wont fit if I remember right!

Even if the Raptor motor could fit in the XT frame. The gear box ratios would all be out.

Cant you fix that by changing the sprocket sizes?

If anyone wants to do the throttle body mod, Kenny has just confirmed with me that he can do our XT's. Mine took 7 days from the UK to USA then 3 days to bore & post back to me, then 5 days to Australia.

Make sure you post the throttle body with a tracking number, mine was around 20 Pounds to post

Send your throttle body to

Enclose a letter stating you want +2mm bored & what bike it is off as Kenny had to make a special clamp for the XT's, with your full return postal address with your email address & PayPal address so Kenny can send you the final bill.

KDS Racing
685 Hope Rd
Floyd, VA 24091
USA

Kenny E-mail kdsracing@gmail.com

can you pay him paypal? because otherwise who the hell is going to pay him dollars and bank transfer and all that business?

Yes payment is via Paypal.

Send your throttle body to

Enclose a letter stating you want +2mm bored, with your full return postal address with your email address & PayPal address so Kenny can send you the final bill.

KDS Racing
685 Hope Rd
Floyd, VA 24091
USA

Kenny E-mail kdsracing@gmail.com

A few of you guys have Emailed & PM me, Kenny is ready for your throttle bodies, I have forwarded all the info to you..

Woo Hoo! Hey guys, this place is cool! As soon as my money is right, I would like to buy a couple of used TB's to sit on the shelf just to have them ready to cut down turnaround time. I could also do a +3 if this works out well.

This place really has my creative side going! I wonder if my CNC program will work on the heads with some slight changes.:unibrow:

Hey, hi Kenny nice of you to drop in.

We could sure use your tallents on our XT's. Tell us about your new piston range that you have developed & the cams you are making for the Raptors?:signthankspin:

Hello Kenny and welcome to :660: all that you see here is entirely my fault!
:incon_aargh[1]:
Enjoy it.

:hismiley: :welcome: to :660: :family:

Good to have you here Kenny - with your creative juices and our forum members' insatiable appetite for performance modifications it should be an exciting and productive time for all of us. We are potentially a big market for you in Europe and beyond and your expertise is good for us, with the main supplier of performance parts in Germany and very expensive.

Thanks so much guys. Yes, I have a new piston lineup as well as cams. It looks like the cam line for this application will have to be tailored a little differently. Which I am actually gonna start working on next week, since I've found this spot.
Obviously I come from the Raptor world, so restraint is not my forte. I am using a new A2 tool steel billets that are hardened all the way through. I am the first company to have a production cam over .500" lift. The duration is smaller than the X-2, X-4 and Hotcam stg 3, but the lobes are much more aggressive. I also have ovate wire, beehive valvesprings an Ti retainers that are designed for the more radical valve motion.
My pistons are the only "corrected" deck height pistons currently on the market. They are made of 2618 materiel that is the strongest forgings I could have made. The ring package is the Total Seal "Max seal" gapless top rings with a tapered second, and low tension 2mm "gold" oil set.
When you combined the design attributes of the piston/ ring package with an evacuation valve to pull a vacuum in the crankcase, you will see substantial gains in power and efficiency when compared to other aftermarket piston packages with the same compression ratio.
I have a CNC ported head that is second to none in power production from bottom to top. They use Ferrea valves with a custom tulip angle....

I have many more products, but I have gone on long enough. I appreciate the opportunity to advertise my wares and I greatly appreciate your hospitality! I look forward to a long relationship with the members of this forum even though I am only able to get a distant cousin of this bike.:laughing7:

Kenny I have a proposal to make to you.

I have a whole spare engine for these bikes. Provided you are willing to buy it from me (at a very cheap price, I promise) and pay for the shipment from London to the US you can then use it as your guinee pig to build parts for them. this engine is complete minus the throttle body, but you have seen these before and soon you are getting one in the post from motonacio (David Pearson) to modify.

Interested?

I am absolutely, positively interested! Just by being able to see pictures of Kev's 700 conversion I have been able to design an indexable adjustable cam gear. TODAY! While you guys can use Raptor 700 parts to make more power, we can see a possible benefit of using a gearbox that has only one counterweight and no reverse. This has the possibility of substantial weight savings for a race Raptor that does not need reverse.:laughing7:

While I am posting, could you see why I am not able to reply to my PM's? I don't have the option of creating or answering PM's. My inbox says I have 7 PM's with an allowable limit of 0:088:

ok I will try to fix it now......

if i don't succeed i know someone who can lol

Please try now Kenny, you should be able to have pm quota of 50 message and should be able to reply, in fact try and reply to my last pm, thanks

Fran

Fixed:WellDone_OROQR1:

As I have said to Kenny already, I want to fit a stroker crank to my XT, but need all the dimentions from both XT & Raptor motors.

If Kenny gets Frans motor, this will open up a whole new tuning side to the XT motor & would be nice if the Raptor boys can gain something as well.:eusa_clap:

It would be sweet if we could use the Hotrods 5 mil stroker in your engine! That thing makes huge torque gains and no piston change would be required.
I hope that XT tranny is as durable as the Raptor version. I already envision a hybrid Raptor 250 frame, XT trans and 800+cc's Raptor top-end, which would easily weigh 50kg less than the base 700. The XT trans looks far more compact. With a 6" extended swingarm, it would be an absolute terror at the races.:glasses2:

David (motonacio) your throttle body is packed and ready to be sent to Kenny in Virginia.

Please make sure Kenny has your returning address.

http://i144.photobucket.com/albums/r...rottlebody.jpg

insight into Kenny's work at KDS

http://www.bluetraxx.com/reviews/kds_throttlebody.htm
http://www.kdsracing.com/

I know Kenny has many things running around in his head now with all this XT stuff.

We are still looking for a 11:1 or 11.5:1 100mm pistons for our XT660's, JE pistons were not interested in making us the above mention pistons, I sent many Emails trying to get them to make them up for us. May be Kenny could have a look for us one day, as a drop in piston is far cheaper then a rebore/re-plate or new cylinder.

I will call this week to make sure they have a forging in the proper size. I'm sure they do, so pistons are just a phone call and a few weeks away:occasion14:

Man you are getting me excited with all this new info.:clap::woo:
That could mean cheap mods for everyone.

Just had news from CaptMoto - the throttle body I bought from him is now on its way to :Worship_9TRHEA: Kenny for him to work his magic on it. :rockwoot:

Hi Kenny, nice to see you on here instead of messing around with the quads all day long.

The XT's head is simmelar to the 700R's, so your CNC heads will work here to.

another throttle body on ebay
 

If anyone else wants to get their mucky hands on another throttle body to send to Kenny there's one on ebay, you better be quick though!!

http://cgi.ebay.co.uk/YAMAHA-XT660-X...3286.m20.l1116

results ?
 

Did I miss something ? All this excitement and I've yet to hear what the result is of the mod ! Kev?

I can definitely feel more HP through the range, I have only played with the mapping by hand & need to run my bike on the dyno to set it up correctly.

Should have it on the dyno soon. If I can get close to 60HP total with all my mods I will be happy.

The throttle body mod works well no effects with poor idling or cutting out. I did 60 miles yesterday & loved it.

I am basically working on the O2 simulator at the moment fine tunning things & want to get both mods on the dyno at the same time.

I am also looking at the other side of the air box & want to fit a stage 3 filter, as I know when I did dyno testing on the stage 1 & 2 filters I found that I could get more HP from the air box by removing the filters & now that I have a +2mm throttle body that can allow even more air into the motor I want to make something up so not to restrict the new throttle body..

Is it not a Suspension and frame mod that is needed:(

If you could mount the Rear mono shock somewhere else, Like the MT03 then it would free the space behind the Carb for a better airbox:occasion14: