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Old 10-13-2019, 08:09 AM
unixphreak unixphreak is offline
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Default New to the Mini Bike go kart scene.

I guess I should have posted here first instead of the engine thread.
I am starting my first predator 212 build to put on a Trailmaster MB200-2.

I have been in the motocross/mechanic/anything engine hobbyist not professional for over 35 years. Now that I have a 10 year old child I would like to expose her to the joys of the outdoors and two and four-wheeled fun.

I never owned a true mini bike (motorcycle and three wheelers galore) but I did have a one wheel drive go-kart when I was 8-9 years old and it was a blast!!!

Going to post a couple pictures of my current engine setup and it mounted on the MB200, waiting on new rear shocks and to figure out a gas tank to use.

Hope to learn a lot from this community.
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WP_20191012_16_48_45_Rich.jpg   WP_20191012_16_50_38_Rich.jpg  


Last edited by unixphreak; 10-13-2019 at 08:11 AM. Reason: grammar/punctuation.
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Old 10-13-2019, 08:34 AM
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I like 1WD karts. They probably won't win any circuit races, but at least they can do burnouts! And it's never boring to drive one!
What does your daughter think of all this?
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Old 10-13-2019, 09:17 AM
unixphreak unixphreak is offline
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She is liking the mini bikes, but I took her to an indoor go kart track and they were electric so the on/off nature of the throttle was not fun for her.
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Old 10-13-2019, 09:21 AM
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Would that be a certain K1 Speed?
I like K1, but the tracks are too small to stretch these karts' legs.
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Old 10-13-2019, 09:31 AM
unixphreak unixphreak is offline
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Yeah that's the one, I do have a kart track down the street from me in Michigan, but its getting that cold time of year and will have to wait till next year.
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Old 10-14-2019, 03:31 AM
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Welcome
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Old 10-14-2019, 05:40 PM
unixphreak unixphreak is offline
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Thank you glad to be here. Has anyone taken apart the Trailmaster MB200 front forks? I would like to try to stiffen the springs and add a bit more oil to tighten up the dampening.

So the top two pics show what it will look like when "finished" still need to put a plastic tank under the fake one (its on the way from amazon) and don't notice the missing top shock bolt (its been installed already)

Now the last picture is the current state until the plastic tank arrives so I can sort out the jetting issues I have with the 24mm Mikuni.

The last part of the build is figuring out a nice clutch driven generator solution to run the headlight and brake and turn signals. I might also weld up a better straight header and add a muffler that has better forestry approved spark arrestor, gotta keep the forests safe!!!
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WP_20191014_23_21_38_Rich.jpg   WP_20191014_23_21_54_Rich.jpg  

WP_20191015_20_10_51_Rich.jpg  

Last edited by unixphreak; 10-17-2019 at 01:37 PM. Reason: Grammar and more thoughts
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Old 10-17-2019, 04:00 PM
unixphreak unixphreak is offline
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Ok, today was a successful test ride after a few days of rain. The bike has alot of torque and it gets up to speed quick!! It feels a little shaky at speed guessing 50mph or so but have not had the nerve to go faster after only the second ride on the bike (once with original engine) and having not used a helmet this time so I need to finish the gas tank and bring it to a proper place to wring it out. Definitely need a quieter muffler this RVL is LOUD!!!

Last edited by unixphreak; 10-17-2019 at 04:01 PM. Reason: Always grammar.
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Old 10-18-2019, 08:14 AM
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What’s been done to the engine?
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Old 10-18-2019, 09:08 AM
unixphreak unixphreak is offline
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Basically a stage 4- I guess, what I have not done is porting (I just did a clean up to get the intake manifold and exhaust manifolds to match the ports and a mild clean to the head itself nothing wild yet), SS valves/valve job and brass guides, roller rockers, or decked the head. Those will be in the future.

I am the same person from this thread http://www.diygokarts.com/vb/showthread.php?t=42190

Now its time to change the oil and check my valve lash. Hope to have my jets and tank today also and get those squared away, still wants to stall when I chop the throttle.

Have to say I am pretty impressed with this engine, need a nice off road area to see how it really performs.
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Old Yesterday, 10:16 AM
unixphreak unixphreak is offline
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Looks like success on the re-jetting, I put a 140 main (raised the needle one from the middle setting) and a 20 pilot and lost the off idle dead spot and its a wheelie monster now!!!. have not don a top speed run yet due to it being winter in Michigan. I am not totally confident in the 140 main and may need a 145 or raising the needle some more. It is still not quite the nice brown color on the plug yet. I have fitted a crf 50 3.5L gas tank on it under the stock fake tank cover and strengthened the handle bars with an add-on cross bar.

Now I need to find out the OD of the Mega-Moto 212MB Pro front fork legs, I want to use the left leg with the brake bosses to add a front brakes to this bike. Anyone have an idea?
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  #12  
Old Yesterday, 05:09 PM
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I'd ask the mods to move this thread out of Introductions. No one comes in here except for a scant few and then just to say Hi and Welcome.

This is more like a build thread and belongs in the Mini Bikes, Trikes and Choppers area.
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Old Today, 06:07 AM
unixphreak unixphreak is offline
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Sorry, and thank you
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Old Today, 11:34 AM
unixphreak unixphreak is offline
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Any Moderator,

Can you please move this thread to the Mini bikes and choppers section?

Thank you.

Chad
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Old Today, 05:07 PM
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Send them a PM.

Look up landuse or itsid.
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Old Today, 05:23 PM
Randy H Randy H is online now
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Don't sweat it. Some guys just hit this lnk.
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