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Discussion Starter · #1 ·
Wanna lay some smack down on modded Raptors?
More to come, its beyond just a port job.....
 

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Discussion Starter · #4 ·
I doubt youve done what Im talkin about. Lots of TIG work for what I have in store.
 

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Discussion Starter · #12 ·
Pix:
One of the hurdles I was gonna face was getting the right springs and retainers to fit my application on raising everything and come to find out Kibble White has already supplied it for the XX. These XX/XR650R replacement valvesprings are much shorter than the stockers(which I think are way too massive to say the least) and come with a spacer/spring seat to accomidate the shorter KW spring. Instead of using the spacers just weld up the boss and remachine it .200" higher and just reuse the stock spring seat.



Now that we can move the spring pocket up and out of harms way(which is the main hurdle to jump on raising the port). we can now build up the roof of the port with weld so we can have the material to open this intake port up some. Then the spring placement is were it needs to be to be able to raise the port once some material has been added to the roof of the port.


Lets add some material to the left side of the port wall as well. Theres plenty on the right side as you can see but none on the left.

 

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Discussion Starter · #13 ·
The possibility of even developing a 54mm inlet port is there. Just gotta have a junk head to cut in half to see if the waterjacket isnt in a key spot to take full advantage of this modification all the way to the seat. Only one way to tell.
Lets boldly go were no one has gone before.
 

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Discussion Starter · #14 · (Edited)

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Discussion Starter · #16 ·
Thanx.
If this sounds expensive it may be. If it works out the way it should I will probably charge in the neighborhood of $1500 for doing up one of these.
 

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Discussion Starter · #20 ·
43.5mm so its in need of some work. The outside OD of the clamping area of the port is 51.8mm so Im talkin about almost a total redo of the intake side of the cylinder head including the TB boot for an aftermarket TB on nonstock TB applications.
 

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Discussion Starter · #26 ·
Thats my plan Tim, thats why I asked ya about duals being a possibilty on the XX chassis.
 

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Discussion Starter · #28 ·
I probably wouldnt either, supply and demand is not gonna be there. For the hardcore guys though, atleast they know who to turn to.
 

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Discussion Starter · #40 ·
I just need a junk head. I was gonna handle all the TIG work and porting. I talked to someone that has a junk head, just waiting for it to come in.
 

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Discussion Starter · #43 ·
The Honda head(XX and the XR for that matter) is in its infantcy compared to the 700 Raptor. The supply and demand has highly outweighed the R&D demand for the Honda stuff compared to the Yamaha. I, along with alot of others on this forum, am tryin to change this. Tim is at the front lines on this market along with an elite few, interesting things are to come.
 

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Discussion Starter · #51 ·
The XR650R stock intake seats will handle a 40mm valve. I thought it would and is now confirmed, one step closer.....
 
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