ModMMax
New member
Well, here it is. The good news is that much of the work has already been done. Bought this from a TY member who changed the tunnel, rolled the chaincase, installed a Doo skid, stretched it to 156 with extraverts, ported and freshened the engine and installed a lightweight front end and ATACC.
I installed a goldfinger, lifted the bars 2 more inches and moved the digatron. Ordered a Boss seat, Outlaw hood, remote fuel screw adjusters, hi tech clutching and V force reeds. Crankshaft is out for welding.
Unsure of what to do for a head, or in this case, heads. Cylinders are ported and pistons and rings are fresh. Compression at 7500 ft was 90# on all cylinders. Don't know if I should be concerned about the apparent low compression or not. MPI's catalogue says that you can use a 1 cc smaller head chamber with porting. My guru friend says that ported engines will often show reduced compression. I don't understand this part yet. Maybe someone will chime in and help to make sense of it for me.
I installed a goldfinger, lifted the bars 2 more inches and moved the digatron. Ordered a Boss seat, Outlaw hood, remote fuel screw adjusters, hi tech clutching and V force reeds. Crankshaft is out for welding.
Unsure of what to do for a head, or in this case, heads. Cylinders are ported and pistons and rings are fresh. Compression at 7500 ft was 90# on all cylinders. Don't know if I should be concerned about the apparent low compression or not. MPI's catalogue says that you can use a 1 cc smaller head chamber with porting. My guru friend says that ported engines will often show reduced compression. I don't understand this part yet. Maybe someone will chime in and help to make sense of it for me.
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Junior
New member
ported motors usually show lower compression because there corrected compression ratio (the compression ratio as measured from the top of the port) is lower, it's lower because the port is higher than it was before, meaning less trapped volume.
for cylinder heads I'd recommend a swappable dome design, it's certainly nice to be able to swap in domes for flatland riding if you want to go for a rip without driving. And for you I would imagine the mountains are a good 15 hour trip minimum.
looks like a sweet project tho, can't wait to see it in final form!
for cylinder heads I'd recommend a swappable dome design, it's certainly nice to be able to swap in domes for flatland riding if you want to go for a rip without driving. And for you I would imagine the mountains are a good 15 hour trip minimum.
looks like a sweet project tho, can't wait to see it in final form!
ModMMax
New member
Starting to look really sweet 
sxviper32
New member
hey, how much was the hood and how much weight do you think it shaved? looks sweet!!!
ModMMax
New member
They claim it weighs 11 #. Don't knwo how much difference. Picked up the original blue one today to remove the guage pod and its sure a lot heavier. It cost $499 usd.
SiR X700
New member
nice sled
THAT would be FUN to ride. Very nice
THAT would be FUN to ride. Very nice
ModMMax
New member
tracked drilling
Decided to drill this track. Its 156 by 2 and came with the sled. Its seen better days and I was planning to replace it with a 159 by 2 for next season. Thought i might as well learn something about stretch and cooling before I retire it. Used a wooden template to drill the pilot holes and then used a 1-1/8" sharpened hole saw to cut the holes. Cutting produced a little smoke and enough heat to vulcanize the holes edges. The outer holes are cut so the inner wheel runs in the middle of the hole. I intend to use 4 rear wheels. I'll post another pic once its in the sled.
Decided to drill this track. Its 156 by 2 and came with the sled. Its seen better days and I was planning to replace it with a 159 by 2 for next season. Thought i might as well learn something about stretch and cooling before I retire it. Used a wooden template to drill the pilot holes and then used a 1-1/8" sharpened hole saw to cut the holes. Cutting produced a little smoke and enough heat to vulcanize the holes edges. The outer holes are cut so the inner wheel runs in the middle of the hole. I intend to use 4 rear wheels. I'll post another pic once its in the sled.
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taylzee
New member
That's a lot of drilling for a man with only one good wing. LOL
ModMMax
New member
I think the count was 186 holes. The two people drilling the holes were real tired of the project by the end. It cost me a lot of beer.
ModMMax
New member
sxviper32
New member
who's rear wheels are they and where did you get them? are they the composte wheels? they look sweet, so does the sled!!!
ModMMax
New member
They are AC 8" wheels. Don't know what version. They came with bearings for about $35ca each. Called my cat friend who ordered them from the AC dealer for me. It surprised me when they came with the windows cut out but I like the look. Biggest issue was the diameter of the axle. Had to use a big wheel axle designed for the doo skid. It is built to use wheels with 1" id bearings. The cat wheels came with .783 id bearings. No bearing is available with an od to fit the wheels and an id of 1" so I had to machine the axle. Not a big deal but I didn't see it coming.
taylzee
New member
Looking good. I take it you're wing is healing well.
ModMMax
New member
I'm feeling much better. 2 weeks since surgery and its nearly back to as good as before the operation. Thanks for asking.
ModMMax
New member
seanmurphy26
New member
nice looking sled. real nice.
