Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
HELP w assembly
81cr450:
Man really blew me away today. Takes a bit to process. Its together, first ride today. I wanna say it's to much, definetly not a track bike. Just "snappy" bap shift bap shift then you hit 3rd & it starts pulling & will really wind up but its so quick 4th's gone you hit 5th & ready to shift into 6th, if you have the room. No 6th wtf, your looking around at this point & just crapping cause you gotta slow down for a turn with out enough room. Geared at 15 / 47 & will take more. The pipe is sposed to be topend but this thing just kills it in bottom end. 1st is useless second can work but your powervalves aint even on yet , 3rd's the hook. d**n.... a well built 550 is useless on the track, it just revs too quick scared of looping ,even rolling on. Who ever figured this as a topend pipe, I thought I might have a dog down low. I rode for 30 minutes on tight slow just amazed @ the hit, then went to my fire road & realized I was only using half of what it has. Sounds weird too, in a good way, the exhaust is REALLY working with the set up. You can use that bottom end & never hear the silencer but when the wave overcomes the pipe you hear the silencer kick in just as the powervalves open . The hottest big bore 2 stroke I've ridden to date. Temps were excellent I could touch the lower second side radiator , so I still have leaning to do.
2 Negatives, vf3's, the flutter aint working to potential up top. Thanks Dave for the direction on this, less petal & bitch for vf2's. The white plastic is the second, I rode it to work at lunch d**n near ate crap unprotected on the pavement rolled on in second around a corner & it said RESPECT. So I've been working on diesel motors at work & the black oil that had transfered to my pant transfered to the plastic & looks like dump already. 1 ride uggghh , but mostly schwing. I'll fill in the radiator fitting & kicker when I get off of this in a bit. Time to ride.
Motorrad:
--- Quote from: 81cr450 on March 29, 2012, 03:06:43 PM ---Man really blew me away today. Takes a bit to process. Its together, first ride today. I wanna say it's to much, definetly not a track bike. Just "snappy" bap shift bap shift then you hit 3rd & it starts pulling & will really wind up but its so quick 4th's gone you hit 5th & ready to shift into 6th, if you have the room. No 6th wtf, your looking around at this point & just crapping cause you gotta slow down for a turn with out enough room. Geared at 15 / 47 & will take more. The pipe is sposed to be topend but this thing just kills it in bottom end. 1st is useless second can work but your powervalves aint even on yet , 3rd's the hook. d**n.... a well built 550 is useless on the track, it just revs too quick scared of looping ,even rolling on. Who ever figured this as a topend pipe, I thought I might have a dog down low. I rode for 30 minutes on tight slow just amazed @ the hit, then went to my fire road & realized I was only using half of what it has. Sounds weird too, in a good way, the exhaust is REALLY working with the set up. You can use that bottom end & never hear the silencer but when the wave overcomes the pipe you hear the silencer kick in just as the powervalves open . The hottest big bore 2 stroke I've ridden to date. Temps were excellent I could touch the lower second side radiator , so I still have leaning to do.
2 Negatives, vf3's, the flutter aint working to potential up top. Thanks Dave for the direction on this, less petal & bitch for vf2's. The white plastic is the second, I rode it to work at lunch d**n near ate crap unprotected on the pavement rolled on in second around a corner & it said RESPECT. So I've been working on diesel motors at work & the black oil that had transfered to my pant transfered to the plastic & looks like dump already. 1 ride uggghh , but mostly schwing. I'll fill in the radiator fitting & kicker when I get off of this in a bit. Time to ride.
--- End quote ---
Did you degree the motor? what port timings are you running? (if you dont want it spread all over the net... Pm em to me.. Id appriciate it)..
Glad to hear its working awesome!.
whats your jetting?
No matter what you do to those V3's... they SUCK ASS..
I was amazed how tight the piston is down in the case.. Definatly couldnt go to 91mm without boring out the cases...
81cr450:
Anybody know of a cheap/easy temp guage. The jetting on this is got me wanting to go leaner than I'm comfortable with so I'm thinking that I better get a temp reading to be sure. I usually just run what the book calls for for my elevation & like it but this is loading up on the pilot & I'm one size smaller pilot than usual with the air screw out all the way. If someone felt like explaining the reasoning behind big bores like leaner jetting I'm all ears. Thanks for the help in advance
alward25:
Trail Tech!!!
DoldGuy:
--- Quote from: 81cr450 on April 03, 2012, 12:26:10 PM ---Anybody know of a cheap/easy temp guage. The jetting on this is got me wanting to go leaner than I'm comfortable with so I'm thinking that I better get a temp reading to be sure. I usually just run what the book calls for for my elevation & like it but this is loading up on the pilot & I'm one size smaller pilot than usual with the air screw out all the way. If someone felt like explaining the reasoning behind big bores like leaner jetting I'm all ears. Thanks for the help in advance
--- End quote ---
Most Big Bores are just that.....Bigger Bores, with no other changes which will increase the vacuum signal (suction) on the carburetor. So using the same carb the motor can & will suck more fuel thru the same size jet, thus making the bike run richer & leads to "Big Bores liking leaner jetting".
I hope this simplified explanation answers your question.
DoldGuy
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