Motorized Bike Crank Balancing Walkthrough
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- čas přidán 22. 08. 2021
- Not the best quality or camera angles but i hope this can help someone out there isnt many recent videos on this. Again, 1/2 inch drill bit 15mm deep in the middle, and 7/16 5mm deep on the 2 side holes. Videos on porting coming in the future
- Auta a dopravní prostředky
Thanks again man taking my motor apart and I’m drilling it with a drill press so it should be a little easier.
Thanks for posting this. Will try it in the future :)
Night and day difference you will never go back to stock
Only some engine crank need balancing you should try wrist pin bearing spacers
My ChinaDoll shakes bad at 24mph, on my mountain bike
Thanks, i will have to give this a try
plan on doing an expansion chamber soon with the stock chinadoll muffler modified on there as a silencer
it will also stop oil from dripping from the stock muffler when stored after riding
Howd it go?
@@user-nu5wf8uf4c The cheap dolphin pipe and silencer eliminated most of my 4 stroking problem
I had a broken 304 stainless 8mm stud in the front that when fixed helped eliminate a lot of vibration issues.( luckily I got it out)
Just hit 40 mph with a 36-tooth sprocket, (downhill.) (Stock ,,, other than exhaust "no mods")
there are some pictures of my bike on my youtube channel. trying some new shit
super reliable 30 year old bike on its 2nd 66cc motor
Hehehh good video
Can i balance my crank by drilling only 3 holes on each side with 12mm drill bit on full penetration
How do you change lower crank needle bearing
15mm, from the very tip (the cone part) of the drill bits?
Does this also work on minarelli build sir?
This video tells me exactly nothing about how to figure out how much material to remove and from what location. Are you just hoping for the best? Based on what are you deciding where to drill and how deep?
How did you check balance?
Decent information but this is lightening, not balancing.
To balance you would need to take the actual weight of the reciprocating mass and remove that much material for a 50% balance, which might not even be ideal for the application.
Lightening is not balancing.
And this is the result of weighing the reciprocating mass and taking off weight to get a 60-65%
And this is for motorized bikes where the reciprocating mass is pretty much the same on any motorized bike motor so I didn't bother videoing the weighing and the math
@@seanolson5900 close but not true. For example if your running reeds with window piston it changes every thing. Many run reeds
@@MedicWillCA yes I know that windowed pistons are lighter and will be different than this I'm talking a normal non reed China doll
How are measuring the weight that needs to be removed for actual balancing?
I work in a engine shop building race engines and the only way to know where to take weight off is to spin balance and every one is going to be different and alot of time you have to add weight not remove it ... this is not showing how to balance unless you show how and where to remove or add the weight....
Good enough for a garage balanced crank
Lmao bozo + no maidens + ratio
i was just thinking this, I built over 5 VG nissan motors, anyways my machine shop does the balancing, and they use a pretty fancy fixture/tool. I've seen it in action once , I wonder how that applies here.
So if I do this right I will get 11,000 rpm?
That’s not how it works
No balance tool to check it? Just drill holes and say its balanced? Is this a joke?
Like I haven’t checked weights or balance lol
So just drill some 7/16 holes 5-6mm apart and it's balanced ??? Okay 🤓
Some peoples kids
Did any of you geniuses think about how the depth of a hole produced using a twist drill is to be measured?
With tape on the bit