CP Piston 100mm 11:1
 

Hello,

I was surfing on the internet and this was coming by.

http://www.gw-racing-parts.de/index2...is=2010&lan=en

Search for this article name: PCPXT660/04-09/100mm

Did somebody tried a higher compression piston with the stock cylinder size?
And so yes is this recommend? HP gain? torque gain?

Is the diamond honing really necessary or only on a engine with allot of km's?

Greetings,
Thom Plas

I have seen their pistons & tunning kits, you get around +1.5 more HP per 1:1 compression point, so you will have 1.5 more HP going from a 10:1 to a 11:1 piston of the same bore size.

If you set the correct deck height for the piston you can see 2 more HP per compression point, the XT has a low deck height as standard.

I would not diamond hone a nikasil bore, I have always used a fine scotch brite pad

The min I would go on the XT motor is 11.5:1 CP piston with a Raptor 102mm cylinder, you can machine the cylinder skirt so the cylinder drops right into the standard XT casings.

Thanks for ur reply, i've found the piston.


http://www.tqsatv.com/proddetail.php...00-TECH-PISTON

Greetings,
Thom Plas

http://i62.tinypic.com/25tiauf.jpg
Christmas is early :)
102mm CP Tech piston 11,5:1 and Throttlebody bored out to 46mm by www.Maxbore.com

Next step is to port my cylinderhead and get a 102mm OTR Cylinder

Is there a other brand or company than OTR that offer bigger exhaust headers?


Cheers

Hi Kev,

Can i run RON 95 and 98 on a 11,5:1 piston?
Or is it only recommend to run RON 98?

And do you know the specs for the needed deck height?

Greetings,
Thom Plas

98 RON would be the one I would be using.

Okay thanks Kev!

Just sent my cylinder head to america for a porting and flowing proccess.
And it will be power coated black
I'll post some pic's if its done!
:team[1]:

Look forward to seeing your results.:occasion14:

Just started with breaking done the bike.
Are there things to look after? what's important?
Also made a 220v adapter for my powercommander.
Build it by myself for only 10 bucks. Normally it cost 70 bucks??
http://i59.tinypic.com/2j5awqb.jpg


http://i57.tinypic.com/2ilhp9t.jpg

Yesterday i went further with the bike.
The engine is finally dismantled from the bike :love-smiley-085:
The hardest part was to lower the engine out of the frame :/
Everything went oke with ur instructions kev.
What is that engine heavy, wow haha.

Kev is there a way to change the thread's name?

Some pics

http://i61.tinypic.com/op8h90.jpg

http://i59.tinypic.com/98x1c1.jpg

Do i need to renew the engine and head bolts when i replace my cylinder and head? Or can i just use the old ones?

Greetings,
Thom Plas

You could get away with the old ones, but they will have stretched a little and lost some of their tensile strength. It is much easier to accurately set the torque on new bolts (particularly the head) rather than used ones.

Hmmm oke oke thanks
Not really convinced to get new ones because they are 120 euro total.

Kev do you renewed them? or do you know other big bores projects who did?

I used mine a few times & never had any problems they are not stretch bolts so you will be OK.

Okay thanks!
did you use locktide?


Also busy with a temperature meter for my oil and coolant :)
Pic's will follow.

Not on the head bolts.

Okay thanks!

Cylinder is now in america to, for big bore and powder coating.

:)

Sooo today I received Oxford heated grips because it's my birthday:chevil:

http://i58.tinypic.com/2bbcqo.jpg

And good news from the company that's working on my cylinder and head. The head is already done and they only need to finish the hone and plate work of the cylinder.

And also there is comming a skid plate for my xt660 from germany :woo:

Looks like all the mods are coming together.

So i had a good deal with some akrapovic cans :077:

http://i59.tinypic.com/148iulx.jpg


Pic's of my new brake and clutch levers
http://i62.tinypic.com/wmjxh1.jpg
http://i62.tinypic.com/9vija1.jpg
http://i58.tinypic.com/2znpaap.jpg

And 2 pic's of the head at the porter.
http://i62.tinypic.com/2yl4fgk.jpg
http://i57.tinypic.com/2wprpck.jpg

Greetings from Holland

Hi kev,

What map do you suggest to run the bike in when its rebuild?
I saw that there were different 700 maps but i dont know which one to take.

Custom map by Marjani - XT660.com; created 5-9-09.
103mm Big Bore|Nicasil cylinder (PowerSeal)|JE piston|CR 11,3:1|ported head (OTR)|Tuned cam (OTR)|PCIII|BSM exhausts|+4mm� larger exhaust pipes (OTR)|DNA stage 1 & 2 Filters|AIS blocked|Rerouted engine breather hose
63,33HP/6500rpm - 75,68 Nm/5500rpm

2005 Yamaha XT660X European model 700CC conversion
Akrapovic exhaust no silencer
DNA Stage 3 air box Kit
AIS closed
In later models Map must be used with oxygen sensor eliminator
Maped by T2NE


XT700 big bore only XTX cam
Raptor 700 conversion 11:1 piston
Carbon Cans
DNA stage 1 & 2 filters
O2 Eliminator
Snorkel out
CO1 set to Zero
98 RON fuel
AIS blocked
53.29 HP @ 6100RPM
50.51 Ft-lbs torque @ 4800RPM
I still need to do more work on this map on the dyno so use it as a guide only.



XT700 big bore only XTX cam
Raptor 700 conversion 11:1 piston
Carbon Cans
DNA stage 1 & 2 filters
O2 Eliminator
Snorkel out
CO1 set to Zero
98 RON fuel
AIS blocked
53.29 HP @ 6100RPM
50.51 Ft-lbs torque @ 4800RPM
I still need to do more work on this map on the dyno so use it as a guide only.

Thanks!! :icon_joker:

With the engine work you have done I would be getting your own custom map built.

You can try the ones mentioned to see what the motor likes but a custom map will always produce the best results.

hmm thought i only needed to make a custom map after it ran in (500km), but thanks again! Haha

Some new pic's of the head and the akrapovic cans with new stickers.

http://i61.tinypic.com/dg2kc4.jpg

http://uploadenfoto.nl/pictures/cf26...2b8d34.jpg</a>
http://uploadenfoto.nl/pictures/49daf732a0f997b6773ad54739c7beda.jpg



Thom

Today i visited the powdercoater again :055:

http://i57.tinypic.com/2ce27mx.jpg
http://i62.tinypic.com/312vhfl.jpg
http://www.imagedump.nl/
http://www.imagedump.nl/

Hello,

I'm trying to make a replica of the DNA stage 3 airbox because original it's to expensive (�700).
Total expenses:
1x 2nd hand airbox �25
1x K&N Filter RC-9410 �48
3x 14mm filter �25
1x Silicone hose 51>76mm �13

Pic's so far.

http://i57.tinypic.com/2dsizxt.jpg

http://i61.tinypic.com/dnyniu.jpg

Greetings,
Thom

Looking very good, had a similar setup to my XT:
stock 100mm, 11:1 CP piston, OTR camshaft and flowed head.
Gave a nice gain and a much sportier feel (fast throttle response and more pull).

Veel succes en veilige km's!
Groeten uit Den Haag ;)

Haha bedankt! Hoe reed hij op de testbank? of is die nooit op de testbank geweest?

Little update on the airbox, fitted small filters.
http://i58.tinypic.com/2d9db12.jpg

http://i60.tinypic.com/2u7yjb7.jpg

Build in the main filter http://www.motor-forum.nl/global/smileys/smile.gif
Only the inlet pipe wasn't good so i used a plastic pipe.

http://i61.tinypic.com/2r70vtv.jpg

Only need to paint the pipe black (between filter and TB) and round everything up.

Looking good, any close up photo's of the main filter & intake?

Hello Kev,

Here the pics!
http://i59.tinypic.com/14mvrbt.jpg

http://i58.tinypic.com/16m0jl4.jpg

http://i62.tinypic.com/34ni3j4.jpg

http://i61.tinypic.com/2dr5jc1.jpg

Looks good mate well done.

Thanks!
I'm curious about the test results when the bike runs!
Will keep you guys posted!:glasses2:

Ben niet op de testbank geweest, want heb de motor kort erna verkocht :( best wel spijt ervan, want diegene had hem vrij snel kapot gereden.
Ik krijg volgende week weer een xt660 uit 2007 met veel minder km's op het blok.

Merkte wel dat de motor veel speelser was na de kit!
Makkelijke wheelies en eerder koppel.
Die custom airbox van je ziet er super uit!
Zou zelf ook wel zoiets willen op mijn nieuwe xt!

Groetjes

Ah lachen! goed op tijd met het weer haha.
Al idee�n wat je eraan wilt veranderen?

why do not you put the filter k & n straight on the collector? it seems that just remove some plastic at the top.
it is important that both direct as the dna.

Hi dani,

Here can you see how dna did it.
I tried to do the same, but its hard the fit the filter.
So the intake is a little bit longer.

Thom
http://i57.tinypic.com/2urscvt.jpg
http://i62.tinypic.com/120jtj8.jpg

have the measurements of the main filter DNA stage3?
if not straight will not be in the least comparable to the dna stage3.is the fluid dynamics.
see my pictures,you have to cut more the top, by the arrows should understand.
http://i.imgur.com/bgUgCNL.jpg


http://i.imgur.com/ykJmo0i.jpg

http://i.imgur.com/AOL42Bj.jpg

Original dna stage3 filter size is 380mm diameter on bottom and 300mm on top with a length of 110mm.

I know what you mean but i wanted that the filter fitted the box.
With a straight intake the filter sticks out on the top.



Today i received my new plastic's from www.motosp.gr "yamaha black"

sorry 380mm diameter is very big.. 38cm? or 38/6,28= 6,05x2= 12,1cm diameter on bottom?
30/6,28= 4,777x2= 9,55cm on the top?
lenght 11cm
know other measures?
http://i.imgur.com/UzgMrBM.jpg