kitcarguy
New member
lookin good man.
Off to the track again to run some laps...lol
Off to the track again to run some laps...lol
RM 250 Powered Road Race kart
- Thread starter Rickracer
- Start date
- Status
anderkart
Moderator
Hey you've got a lot of stuff done this week. It always takes awhile to get all the bugs worked out but your doin great man. You might consider building some pipe and silencer mounts using springs like these: http://www.kartsandparts.ca/store/product.php?productid=2288&cat=707&page=1.
motor_head
expert garbage picker
guess it prolly doesn't matter since its a race track cart but for offroad it the angles aren't right the bump steer is bad
Rickracer
RM250 Race Kart Driver
No suspension, no bumpsteer, 
I've seen those at the track Anderkart, and to me, they just look kinda cheesy, even though they are on high $$ karts. I think once I get a stronger tab welded back on the rear of the chamber, and a rubber grommet type mount, (sorta like a shock mount, the way the silencer is mounted), it will stay put. I do plan to put a spring or two between the silencer and the stinger, like the head pipe has, but I gotta wait for my buddy Mike to get his TIG wired up so I can weld some tabs on the silencer for that, I don't feel like changing my MIG over and buying aluminum wire, it just doesn't work that well on aluminum anyway.
I've seen those at the track Anderkart, and to me, they just look kinda cheesy, even though they are on high $$ karts. I think once I get a stronger tab welded back on the rear of the chamber, and a rubber grommet type mount, (sorta like a shock mount, the way the silencer is mounted), it will stay put. I do plan to put a spring or two between the silencer and the stinger, like the head pipe has, but I gotta wait for my buddy Mike to get his TIG wired up so I can weld some tabs on the silencer for that, I don't feel like changing my MIG over and buying aluminum wire, it just doesn't work that well on aluminum anyway.
Rickracer
RM250 Race Kart Driver
Floor pan done, front brakes plumbed but not bled, I wanna use DOT4, and I'm gonna switch the rear brake system to DOT 4 as well at the same time.
Smurph
Code Poet
how much did the brake kit cost?
Rickracer
RM250 Race Kart Driver
I got it from a guy in Cali for $200 + shipping.
kazkepox
Pro- one idea to the next
I can't wait to get a job and build one of these.
kitcarguy
New member
Forget building one for me,
I am just going to buy off the shelf...haha. I can get a used Tony Kart at a good price with a 125cc rotax on it. Cant imagine needing anything more than that.
Hahaha.
Hey Rick. The weekend is fast approaching. Karting hours are being changed at the track Hopefully lights will go up soon and karting will go on until 10pm or so
I am just going to buy off the shelf...haha. I can get a used Tony Kart at a good price with a 125cc rotax on it. Cant imagine needing anything more than that.
Hahaha.
Hey Rick. The weekend is fast approaching. Karting hours are being changed at the track
Hopefully lights will go up soon and karting will go on until 10pm or so
Rickracer
RM250 Race Kart Driver
Well, I made it to the dragstrip last night. My friend Johnny was there, and took some video with my Nikon Coolpix. The kart ran great all night. Traction was practically non-existant, and the top end was like ice for some reason. I spun it out on the big end on my 2nd pass, , while sliding backwards, it stalled, and by the time I got it spun back around, I didn't have enough speed, nor was I able to downshift quick enough to bump start it, but the track guys at the timing booth hopped the fence and gave me a push start and I was able to drive back to the pits.
All in all, I had a blast, and had absolutely no problems with the kart itself, made every pass and got back to the staging lanes under it own power.
In this 3rd video, I had adjusted the brake bias adjuster so that I only had front brakes, and was actually able to do a little bit of a burnout, which got the best short time of the night, a 1.905. Best mph was 63, but that was entirely due to no traction, as you can hear in all the videos, I was in and out of the gas all the way down every pass.
I never let the tires get wet, but they were picking up a little VHT. More practice will help things get better, maybe actually backing the rear tires onto some wet pavement and doing a 2nd gear burnout instead of low, but I think the only thing that will really help the overall ETs will be some new, softer tires. I'll probably need to get a set that are gumball soft, and use them only for drag racing.
I've still got some tuning to do, the carb jetting is still "as delivered" and I'm sure it's gonna need some jetting. It always ran better and crisper at the end of a run than at the beginning, so I think it's fat, which is OK, with 2 strokes, fat is happy , but lean is mean. I've got more power than I can use anyway, but once I get it tuned a little better, I think the power will be a little more controllable. I definitely need to do some work on the shifting arm. After driving it some, I feel like the pattern is backwards from the way it should be, so I'm gonna shorten the shift arm on the motor, and switch it from the bottom to the top, which will reverse the pattern from one back, four forward, to one forward, four back, and give me a more positive shift. Last night, it was kinda hard to tell sometimes whether it shifted or not. Somewhere between the lack of traction and the odd shifter action, I often couldn't tell if it actually shifted.
I spun it out on the big end on my 2nd pass, , while sliding backwards, it stalled, and by the time I got it spun back around, I didn't have enough speed, nor was I able to downshift quick enough to bump start it, but the track guys at the timing booth hopped the fence and gave me a push start and I was able to drive back to the pits. All in all, I had a blast, and had absolutely no problems with the kart itself, made every pass and got back to the staging lanes under it own power.
In this 3rd video, I had adjusted the brake bias adjuster so that I only had front brakes, and was actually able to do a little bit of a burnout, which got the best short time of the night, a 1.905. Best mph was 63, but that was entirely due to no traction, as you can hear in all the videos, I was in and out of the gas all the way down every pass.
I never let the tires get wet, but they were picking up a little VHT. More practice will help things get better, maybe actually backing the rear tires onto some wet pavement and doing a 2nd gear burnout instead of low, but I think the only thing that will really help the overall ETs will be some new, softer tires. I'll probably need to get a set that are gumball soft, and use them only for drag racing.
I've still got some tuning to do, the carb jetting is still "as delivered" and I'm sure it's gonna need some jetting. It always ran better and crisper at the end of a run than at the beginning, so I think it's fat, which is OK, with 2 strokes, fat is happy , but lean is mean. I've got more power than I can use anyway, but once I get it tuned a little better, I think the power will be a little more controllable. I definitely need to do some work on the shifting arm. After driving it some, I feel like the pattern is backwards from the way it should be, so I'm gonna shorten the shift arm on the motor, and switch it from the bottom to the top, which will reverse the pattern from one back, four forward, to one forward, four back, and give me a more positive shift. Last night, it was kinda hard to tell sometimes whether it shifted or not. Somewhere between the lack of traction and the odd shifter action, I often couldn't tell if it actually shifted.
kitcarguy
New member
It was good having you out there last night Rick. The kart was looking good. If I did not have such a fat *** I would have taken it for a spin...haha
kazkepox
Pro- one idea to the next
woah where is this at?
Rickracer
RM250 Race Kart Driver
We were at CFRC (Central Florida Racing Complex) in South Orlando. On Friday nights, they let kids run on pocket bikes, ATVs, etc., and they've got some pretty fast Banshees that run too.
kazkepox
Pro- one idea to the next
hah I was looking at their website Me and my dad plan on going to an event their once i get my kart(s) finished to do some testing and general fun I hope to see you guys there
I hope to see you guys there
kazkepox
Pro- one idea to the next
do they have the road course built yet?
Rickracer
RM250 Race Kart Driver
Yes, it's done, but I think they are waiting for the asphalt to cure before racing on the new parts of it. It was a one mile course before, now it's 1.5 miles. Not sure how much of it will be open for karting though. The "owner" kart course was 1 mile before, and it was pretty cool, now it's been "taken over" (leased) by the sole importer of Tony Karts, who runs it, from what I understand, the rental karts now don't run on the same course as the owner karts. Kitcarguy can probably fill you in a little better on the details, he works there,
The "owner" kart course was 1 mile before, and it was pretty cool, now it's been "taken over" (leased) by the sole importer of Tony Karts, who runs it, from what I understand, the rental karts now don't run on the same course as the owner karts. Kitcarguy can probably fill you in a little better on the details, he works there, Smurph
Code Poet
lol 200 id gear it to hit like only 120 or something so you get tons of toqure and it will do crazy burnouts and dounts on demand. because whats the point of havings the gearing to do 200. unless you plan on doing it.
Also, If he gears it to have "less torque", that's not necessarily saying he won't have "enough torque". It is rather easy to spin those back tires with a 250cc engine, and having a ratio that would be really slow on take-off with a more typical go kart engine may still allow him to do plenty of donuts at will in 1st.
It's my opinion that the crazy karts you see on youtube such as the busa engine, or any other large engines are geared way wrong. It's not that they shouldn't be able to burnout (you won't even almost stop that without doubling or tripling your tire size), it's just that they could make a very drastic change in their ratio, still do all the drifting/burnouts/donuts they want, and still get better results overall.
Typically bike engines are made to power a much larger wheel. Larger wheels take more torque to turn. It's not too easy for a 5hp briggs to move a kart on 15" diameter tires without gaining some torque in your gearing or torque converter. But a 1000cc engine should be able to go on with a 1:1 ratio between axle and engine on the same tires. It won't be quite what you see on youtube, but it will be dangerous fast.
kitcarguy
New member
Our first full road course event is Nov 15th. It is limited to 80 cars (no karts) There are no plans to do karting on the full road course.
But I am hearing a few rumors that the kart track might be expanded a bit in the future.
Also the owners and rentals run on the same course. I believe the owners get about 25 minutes per hour and the rentals get the remainder. On Sundays we expand the course a bit using our existing track. Sundays an Owner day, but they have been known to let rentals go out.
But I am hearing a few rumors that the kart track might be expanded a bit in the future.
Also the owners and rentals run on the same course. I believe the owners get about 25 minutes per hour and the rentals get the remainder. On Sundays we expand the course a bit using our existing track. Sundays an Owner day, but they have been known to let rentals go out.
kazkepox
Pro- one idea to the next
they have an event on my birthday 
Rickracer
RM250 Race Kart Driver
They run karts on Sundays now??? I guess I've been so busy on the kart I haven't kept up with the changes since Andre took over.
How long is the kart track now? It was a mile, IIRC.
How long is the kart track now? It was a mile, IIRC.
- Status