Mini bike MAX RPM with a stock rod pt3
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- čas přidán 28. 11. 2023
- Mini bike MAX RPM with a stock rod pt3
Installed valve shims and an aluminum retainer kit on the already modified Tillotson 212-powered Motovox mini bike to see how much more RPM the stock rod could handle.
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Thanks for doing this test nobody else tries pushing stock rods to the breaking point. Also what I think is happening is at high rpm’s the rod isn’t getting lubricated properly that’s when you feel the vibrations and loss of power. The dipper splash oiling system just isn’t enough at those rpms. Keep up the good work look forward to your videos. 👍
Yes, tis is what im thinking . I had a flathead Briggs do the same thing back in the day. It ultimately seized the rod to the crank breaking the rod.
Intermittent fuel starvation, possible float bowl aeration caused by vibrations at high rpm.
I currently drive with this type of set up on a extreme power us motor and i don't have my GPS to see how fast i was going but i too feel like it lost some power today the only thing I guessing it could be is that one of the valves springs came loose or the spark plugs Bent. I was last messing with the valve springs before it happened. Awesome video and that rear sprocket looks badass😎
Excellent content B66. You bike mods are next level. The engine sounds like it kept pulling throughout the RPM range.
Epic just got a cast aluminum fly wheel
I love your videos I’m doing all the mods you did for my 98cc engine.
Black 66, Once again thanks for everything you do dude! You have the best mini bike channel! Ive told you several times before, but your channel is the reason i got into mini bikes again, now i currently have 12 and thats with selling a few recently lol. Can never have too many😄
Yes! 12 bikes 👍👍👍
That ought a juice it up a bit 💪🏼💯💨💨💨💨💨💨
Great video Black! I like that you used the clamp now to change the valve springs instead of the screwdriver like you used to. I always say! Work smarter not harder! Can't wait for the next video :)
I had a 10,000 on a 212 (non hemi) port and polished the gills out of it, port matched in A.D.D. fashion. 20,000s shave, 24 pound springs. Mod 2 cam, bullet rod, flat piston, flywheel. Frankly was amazed it started. It would go like an animal, but head gasket would fry in days. Once it got hot. Loss compression, loos power. My top rpm I got was 7500
Do a breakdown and rebuild video for us. You can toss a 58mm stroke crank in it while you’re inside that beast
Science! Great video as always.
After watching these I did a similar test with a bsp-4 cam with the stock rod in a tillotson. It ran fine for a month or so until the other day when it felt like I was slamming on the brakes in the high rpm’s just like this. Definitely getting a billet rod
If you watch the follow up video to the stock rod video you will see why the stock rod doesn't stack up. czcams.com/video/r9lghhRinK8/video.html
It’s the rod and crank for sure. Same thing just happened too me on a stock motor rebuilt and back too normal
Could it be that the coil is breaking up at high rpm?
the minibike expert may say the piston is starting to hit the head with the tin gasket and stretchy rod!
I've noticed they really start to have problems around 15hp. They end up turning the big end of the rod into an oval and pinching the oil clearance doing so and then detonating.
When my rod welded itself to the crank it felt like I was driving with the brakes on
Fuel or Ignition.
I would look for water in the fuel first.
Coils as they heat up with S__T the bed but run fine at low/idle.
Dyno makes a rev limiter coil that I put on my Ducar 224 just to be safe.
5250rpm might not be everyones idea of enough but I ride off road with a lot of stop and go, trying to build a torquey bike.
I got my stock rod never experienced that but my ducar has a oval track cam i believe but all in all its just another brick in the WALL ......
Are you from fernley Navada or just have lived there?
My bet is ignition cut
I believe you would be spinning the rod bearings if the stock rod had them. More than likely an oiling issue.
are the Tillson and predators rods the same strength?
How much feet of chain to fit for a mega moto 105? And would a 12tooth clutch 35 chain work on a 60t sprocket 420 chain
I would love a gas tank like that for my bt200x what can we work out
what gas you running that you need a fuel pump is it methanol?
Link to west for the mbx10 mini bike ?
Would turn 7700-7800 all the time on factory rod and piston. On multiple HF predator cheapie motors. Would also spray them with 8hp worth of nitrous. Broke a piston or 3... never a rod.
Fuel tank vent restricted.
What gas tank is that and where can I find one for my monster moto bike
Its a brad hill tank. Check out the build video on this bike. czcams.com/video/qE-aznzxMrQ/video.html
What do you torque your stock rod to after a full gov delete?
110 inch pounds bud 💪🏼💯💨💨💨
Oil the threads a bit too on the bolts
Would love to find someone that could build a engine for me
I bet the rod isnt getting oiled good enough at that high of rpms…
Is it still running or is she done
It lived on! I have done quite a few videos with this bike after this video. czcams.com/video/r9lghhRinK8/video.html
Dude, tachs are $22 dollars. I'll buy you one ffs!
It's easy enough to use the gear ratio calculator. Check the playlist. Have used a tach in MANY videos.