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Hi Kev.
Did you port the head yourself? |
Yes I did Freez, I did not go over board & do the guides. I have done a few heads in the past & have got 2 years of info off the Raptor forums on what the Raptor heads like & which areas need work & applied it to the XT head with a bit of common sense.
I have a before dyno run from last year with my standard motor & will run the bike on the same dyno with the same set up, to see if there any gains or losses. |
Hello Kev,
what tools do you use to p&p the head? It looks great! |
Thanks Marcel.
To get to this stage was 4 hours of work, first shaping & flow the valve seats to match the inlet ports, then flow the port all the way through. Polish then lots of elbo grease with different grades of sand paper, finishing off with fine grade water paper. Freez do you have a price on +1mm & +2mm inlet valve please. http://i201.photobucket.com/albums/a...x/DSCF2580.jpg |
I finished off my spare head today. I lapped in all the valves & re-assembled the head.
Kev2 machined the Raptor 700 cylinder last weekend, so it will fit straight into a standard XT660 crank case. I now have a bolt on kit that will produce over 60HP depending which cam I use. http://www.youtube.com/watch?v=X6Qg_4Ef_cA http://i201.photobucket.com/albums/a...evxtx/a-10.jpg http://i201.photobucket.com/albums/aa202/kevxtx/c-6.jpg http://i201.photobucket.com/albums/aa202/kevxtx/b-8.jpg http://i201.photobucket.com/albums/aa202/kevxtx/d-5.jpg http://i201.photobucket.com/albums/aa202/kevxtx/g-3.jpg http://i201.photobucket.com/albums/aa202/kevxtx/h-3.jpg http://i201.photobucket.com/albums/aa202/kevxtx/i-3.jpg http://i201.photobucket.com/albums/aa202/kevxtx/j-2.jpg http://i201.photobucket.com/albums/aa202/kevxtx/k-1.jpg http://i201.photobucket.com/albums/aa202/kevxtx/m-1.jpg http://www.youtube.com/watch?v=X6Qg_4Ef_cA |
Kev are you using oversized valves?
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I admire your work Kev, it's like watching a sculptor or a painter. Good stuff! :notworthy:
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It is a easy job to get the seat cut for the bigger valves & match the port to the seats. |
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Hi Kev.
I normally sell the valves with new custom made phosphor bonze guides. The valve and guide goes for about $32 each. Valve by itself is $22. Valves are stainless and the price is the same for any size you need for the XT. |
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Hmmm, need to increase the price then...lol.
Just joking. The intake valves, even at +2mm are the same weight or slightly less than the stock valves. Exhaust valves are quite a bit lighter and also features a special design to help reduce reverse exhaust flow from getting back into the combustion chamber. This means that you don�t need to upgrade the valve springs to run these valves. |
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Hi DL700, nice to see you on the XT660 forum, hopefully we can gain from your great Raptor knowledge.
For the forum members DL700 is one of the best Raptor engine builders out there, he knows these motors backwards. One thing we have been trying to do for while & Kenny was helping me before he went missing, was to find a stroker crank which would fit straight into our XT660 motor. Can I send you all the dimensions of the XT crank to check it against a RHINO or one of the other 700's cranks? Here are some of the measurements I can get more as the crank is still removed. http://www.xt660.com/showthread.php?p=82827#post82827 What we do know is a Raptor +5mm stroker crankshaft fits in the XT casings with no modifications, but you also need to fit a Raptor Rotor & starter clutch & Raptor stator coils, which makes the conversion quite expensive once you have bought the stroker crank, approx US$1000.00. I am really keen to do a stroker conversion on my XT & have been dealing with Geisick who will make me a stroker crank, I have been looking for a cheap XT660 crank core so he can do it for me, the cost is also high once you buy a used XT crank send it to the states build one balance & post back to Australia around US$1000.00. So we can find a 700 stroker crank that is the same as the XT660 the mod would be cost effective. |
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weve only been building the 700 motors for a short time but have pushed the Hp bar to new heights on the smaller cc units as our specialty, we have also done some great work with the older 5 valve motors as well, having custom profile cams for both... we will look into a cheaper alternative to adding a stroke to the XT660 motor if possible, if we could get a stroker for less then $500 usd would be the goal. send me the info you have @ highdesertdyno@yahoo.com or contact thru www.highdesertdyno.com |
$500 would be perfect if possible, thanks for your help on this one, I will gather all the info I have & E-mail you directly soon. Cheers Kev.
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Kev...I am sending some stuff to the States...pm me, mate.
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the crank pics...look up Schoemrich..his thread
Some Greeks did a "bitza" and had a Raptor stator , and raptor generator with new timing marks... |
Sorry, now dulpicated the link.....here you go dl700, XT vs. Raptor Crankshaft..
http://www.xt660.com/showthread.php?t=9202 |
what was the deck height of the OEM and JE piston?
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I gave you the deck height for the STD 10:1 660 piston & 660 cylinder the other day, but can't seem to find where I wrote down the height for the JE 11:1 piston & Raptor cylinder, I will keep looking as it is bugging me now, I hate loosing info.
When fitting a +5mm Hot Rod stroker on a Raptor 700 standard piston how much does it lift the piston in the sleeve by? Or by how many compression points? How much do you guys sell the +5mm Hot Rod cranks for? As my options seem to be looking at this Raptor 700 +5mm crank, Raptor rotor & Raptor magneto, as a straight bolt in option. |
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the HR +5 crank retains oem compression height as the rod is 2.5 mm shorten then stock they go for around $350 usd compression is about.5 gain |
Thanks for the prices.
The standard XT660 10:1 piston & standard 660 cylinder has a deck height of approx 1.7mm. What approx HP & torque gain does a 5mm stroker crank produce on a Raptor on it's own? I have been trying to find a dyno run on the net, no luck so far, with the results of just adding a stroker crank. |
Goodness.....
Ok ok well I have bin away for a bit after I sold my latest XT660X and bought a SuperTen 1200. So call me out of date, sure. But I just bought a Raptor 700, so am reading up about this motor, and so have bin reading this thread with all of the mods and the following dumb questions come to mind:
(1) Upon superficial observation the Raptor engine SEEMS very very similar to the good ol XT660. Sure I now have reverse gear, but otherwise..... (2) I seem to now have LOADS more torque and I think less horses, which is perfect for off road of course. (3) So but er if you wanna Raptor 700 motor in yer bike why not transplant the engine (having removed reverse I guess). Are the engines sooooooo different then??? Thanks Simon |
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