what motor did you run at pinelake?

[trebmaster]

I am sure that after attending the races at pinelake several members will be building thear own machenes. who wants to start out telling what combo of motor and tranny they were running so we(future builders) can get some ideas .

[Joe M]

Scrambler with a JLO 400 Stock and t-20.

[Mike]

Max II with bandolero motor (28hp) and T20.

The first day during the heats I was dead even with mad max 500cc in his Max II with a 25hp Kohler. I adjusted my jetting after the heats and was able to get it running better for the races on Sunday. After that I was able to pull away from him but still not by much.

[hydromike]

I ran a 440 JLO, a Chaparral 484, and a 503 Rotax.... all machines were T-20s. That stock 440 in the Superchief ran the best of all my engines all weekend. The Rotax has something seriously wrong in its' setup.... it lacked guts all weekend and fell on its' face at the starting line each time. The 484 engine still has a couple bugs to be worked out, but is turning into quite a nice li'l engine.

~m

[racerone3]

stock JLO 400 with a 28mm carb. i seriously need more HP. T-20. seemed to pick up a little speed every time i lost a wheel, but it was harder to steer

[Don]

Stock 484 Chap with a Baker / Hill 6000 (much recomended for high-speed fun). The Chap didn't run well when it heated up, but it will next time: guaranteed.

(Bud) Stock 440 Kawasaki with a T20

(Q) stock 400 JLO ('cept for the pipe) and a T20

[micmac]

I'd like to widen the info a bit. Not looking for top secret racing info or anything but for us building machines or new to racing how about some info on but not limited to:

Roll cage design - as there where roll overs a plenty. What worked good what would you change etc

Tires and wheel combos

Frame reinforcement. Any bent frames out there?

any other race tips would great

Mike

[George]

I ran with a Chaparral 484 converted to CDI ignition.

It ran great until the CDI box became unplugged. I ended up getting into my last race a few laps late.

T-20 transmission.

[George]

I'd like to widen the info a bit. Not looking for top secret racing info or anything but for us building machines or new to racing how about some info on but not limited to:

Roll cage design - as there where roll overs a plenty. What worked good what would you change etc

Tires and wheel combos

Frame reinforcement. Any bent frames out there?

any other race tips would great

Mike

I think a soft ride is very helpful.

[Don]

any other race tips would great

1) Wait for the green flag

2) Open the throttle all the way

3) steer

[turvuren]

JLO engine

For you 440 jlo owners i have a pair of 6 bolt NOS cylinders to sell. I latched on to a 4 and a 6 bolt pair. The engine I have is a 4 bolt.
Tim

[6X6]

Turvuren. You know that you can put the 6-bolt heads and cylinders onto a 4 bolt JLO bottom end, right? Easy way to put in extra ponies. I have a 4 bolt 440 I got from Don, and a set of 6-bolt heads/cylinders and pistons to liven it up, but I found a nicer engine, now if classes will start again, it and the Chap get rebuilt and "Tuned" Boogittyy, Boogittyy,

EDIT: Micmac, I went with a 2-hoop style cage. Self righting or easy to tip back up again. My tips are (though I haven't raced an aatv YET)
1) Tie into the frame as solidly as possible. (Personally I won't do a "Belly Band" cage on anything more than a 1-Cyl 2-stroke or mild 4)
2) Keep everything inside the cage, Pipes hanging out cause ended days after even a gentle roll.
3) If hoop style cage, keep the outside "Roll" lines as close to in line with the outside of the body as possible,
this should reduce the strain on everything in the event of a roll-over, you'll take less of a hit, the machine will too, and your more likely to land shiny side up.

[jpswift1]

I ran a JLO 440 (6 bolt head) with a 34mm Mikuni and a Baker Hill 6000 straight shaft forward only transmission in my first generation Attex racer. I wouldn't have got to run it if it weren't for the help of all of you guys though......a huge thank you everyone! I rebuilt the 440, the machine shop opened up the ports a little bit and bored it out .020, I installed a set of Wiseco forged pistons, and all new gaskets. It had under an hour of run time before I hit the track. I have to say, I was amazed at the performance of that engine and I fell in love with 2 strokes again! It never missed a beat. Luckily Hydromike had an extra flywheel for me at his shop or I wouldn't have had it running. It fired right up after the races too without any issues.

[techfx]

I had a 97 polaris 440 liquid cooled w/ a honda goldwing radiator and 2 smaller mikuni carbs (can't remember size and they're2500 miles away) w/ oil injection. Hastily put into a RIM, scary to squeeze the throttle wide open untested.


Dad ran a 500cc (or more?) Sachs racing sled engine with some really big mikuni carbs from the 70s until it seized.

Racing tip: Keep the rubber side down!