Yamaha XT660X - who's got one?

[Frodo]

[QUOTE=xtx;1507635]It was 51.8 HP before the 700cc stage 1 cam conversion, keen to see what the gains are after the conversion.
QUOTE]

That's some serious modification! Keep us posted how you get on.

I have a Aprilia Pegaso Trail that has a similar motor to the XT. I had to fit a Power Commander to get it to run right and now (with a K&N filter) it runs really well. Power is sufficient for my needs and certainly better than the F650 it replaced.

Cheers

[NZsarge]

It was 51.8 HP before the 700cc stage 1 cam conversion, keen to see what the gains are after the conversion.

Wicked! Nice to see you're employing the dremel tool too!

[K slider]

All those mods are great I have looked at 700 barrel option also.
I got off my F650 Dakar and onto the big wheel 660, it handled much better and delivered the power down low unlike the BMW as a result I have put an order in the UK for the new Tenere which I will try and find a way to shed a few Kgs.
I love them and they are Japanese {sort of}.
Pete.

[xtx]

Tha raptor barrel does not fit straight on, I had to machine the casings by 0.98mm. Next time I would machine the bottom of the sleave. I also had to make a cut away for a breather at the bottom of the cylinder & slot the 6mm holes on the side of the Raptor barrel









Also the Raptor Hot Cam needs some extra bits from the raptor. Sprocket decompressioner & pin. I bought a used Raptor compelte cam from a bike breaker in the States US$66.00 posted, the extra parts from Yamaha was US$330.00. The Stage 1 Hot cam was US$150.00 posted.

[NZsarge]

After this conversion to 700cc and the hot up what are you expecting/hoping to see at the rear wheel(hp)?

[xtx]

Not to sure, if I get 5 or 6 HP gain I would be happy. I did not go for the stage 2 cam as I still want the bottom end torque. The stage 2 gives 6 hp on it's own. So a 2mm bigger bore, 10:1 to a 11:1 piston & stage 1 cam should give a 5hp gain. Giving a total with all my other mods a 25% gain in power & torque

I broke my achillies tendon last weekend & had surgery. I am out of action for a while. The bike was surposed to go on the Dyno this past Monday, I will get on the dyno soon.

[NZsarge]

Not to sure, if I get 5 or 6 HP gain I would be happy. I did not go for the stage 2 cam as I still want the bottom end torque. The stage 2 gives 6 hp on it's own. So a 2mm bigger bore, 10:1 to a 11:1 piston & stage 1 cam should give a 5hp gain. Giving a total with all my mods a 25% gain in power & torque

I broke my achillies tendon last weekend & had surgery. I am out of action for a while. The bike was surposed to go on the Dyno this past Monday, I will get on the dyno soon.

If you can squeeze 25% out of it that would be a pretty healthy jump in the go department, bugger about the archillies tendon man.

[xtx]

Got my timing cover back.

http://i201.photobucket.com/albums/a...evxtx/1-14.jpg

This was my dyno run before the 700cc mod, I was sorting the fuel map when I fitted the these mods. That was with PCIII Carbon can pipes DNA stage 1 & 2 filters, snorkel removed AIS blocked off.

I still have to run the 700cc conversion on the dyno, I will do it as soon as I can ride again.

http://i201.photobucket.com/albums/a...180108Dyno.jpg

[xtx]

Well the results are out for the XT700 conversion, I am still testing a few different camshafts over the next few days, so more dyno sheets to come.

Just short of 57HP, 56.92 @ 6500RPM. I have lost a bit of the bottom end but gained alot on the top.

[NordieBoy]

Nice.
What carbs are you running?

[Morcs]

Get a DR-Z400SM

Mine goes like stink now.

[NordieBoy]

Get a DR-Z400SM

Mine goes like stink now.

You've put the TL engine in it?

[Morcs]

You've put the TL engine in it?

Nah. Full yoshi system alone has made one hell-ova improvement.

[NordieBoy]

Nah. Full yoshi system alone has made one hell-ova improvement.

Should'a done the engine

[deanohit]

Should'a done the engine

Wow, what is in that beast?