you've certainly experimented extensively. and besides the porting-the pipe and carb and tunong are just as important. so after all that - anything stand out in your mind as "real good"? do you ride all these motors and combos? how long do they typically last? i'd like more details. do you upgrade the bearings? true the crankshafts? the cranks are rarely usable as recieved for any high performance build IMO. not all of us have machine shops- what would you recomend as most important when someone builds a motor? all i'm saying is theres a lot more to a good running motorized bike than the port timing and configuration.find out what works and stick with that; then make a motor that holds together for a year . no mention of what brand oil you like and what ratio; i find using high quality synthetics(red- line) to be super important. etc etc
I belive I did make a video on two stroke oils tested many brands if you have the money the best has been amsoil dominator as far as bearings go skf are fine. I also have ran stock crank bearings. If your a bolt on kinda person. You can't compare a 20 $ ported stock cyl to say a mxs or Piaggio or minerell cyl. But that being said I tried all set ups from scooter cyls from 38 mm strokes to 44 mm stroke cranks to case Reed set ups . At the end of the day I preferred a 47 x 40 mm ported stock cheap junk ported by myself g2 reeds and mikuni carb and pipe. As far as how long a motor will last that depends on lot of stuff meaning if you build a engine properly and don't try riding it around at 10,000 + rpm all day long . Long lasting motors have been one set up properly 47 x 40 mm China junk with a 7 cc head out of hundreds of combos I have only had one mechanical failure. My fault to much rpm . Most miles I have ever put on a motor is about 10,000 miles I had 4 bikes at one time during my testing so it was kinda hard to put more than 10,000 miles one 1⃣ bike
ua-cam.com/users/shortspvAETEhp70M?feature=share. Simple motor with head pipe reeds carb stock crank stock cases 47 x 40 vm18 cyl stock 20$ cyl ported by me
Who hates them 4 years ago I'm the guy that gave the information out that they basically would bolt on. 4 yrs ago I did All this stuff mabe 5 now from case reeds to strokers to mxs to saws. Basically went full circle back to the stock junk stuff. But just with legit porting tips. Anyone can bolt on a minerrelle cyl not everyone can get a 20$ cyl ripping. Basically I can't take any credit for bolting on a pre made cyls. But short answer would be there not ideal for in traffic or hills there eather off the power band or on the power band can't ride around all day at 11000 RPM basically
I always raise the exhaust roof to achieve my desired exhaust duration and blowdown & blowdown % I also make my exhaust port width 70% of bore diameter. Depending on what cyl I use. Meaning if it's a g4 cyl with off set exhaust port I will only widen it above the the blowdown ie tranfer opening got vids showing why
@@2strokecarbtuningportingin187 I've watched a lot of your stuff very informative actually the most informative I've found. You explain things the way I can understand. I was just having a problem understanding how high to raise them and not mess things up. I understand the width and not going below the transfer openings.
@@bowmadman9562 to much of anything is never good. Small bore two strokes are sensitive. Basically porting is a big part of determining how it functions. Exhaust port width hight and roof shape kinda determines how and where the power is delivered. Along with the amount of blowdown and tranfer duration and inlet duration. Basically everything needs to work in harmony. Typically that's why I show people the math and blowdown % these aren't Yamahas Hondas or Suzukis we don't have luxury of displacement or gears. Problem I see with most folks they want to run before they learn to walk. There's 500 different routes to take to get to the same destination. When learning best advice it keep things simple less is better.two strokes are simple just misunderstood.
@@2strokecarbtuningportingin187 I used to hear this "there's no replacement for displacement"..thanks for your help I'll keep watching and learning I can tell you know your stuff
One day I'll be this good!
Easy stuff watch a few of my vids hit the like button take your time do best you can do.
Thank you
Simple stuff you cant go wrong
you've certainly experimented extensively. and besides the porting-the pipe and carb and tunong are just as important. so after all that - anything stand out in your mind as "real good"? do you ride all these motors and combos? how long do they typically last? i'd like more details. do you upgrade the bearings? true the crankshafts? the cranks are rarely usable as recieved for any high performance build IMO. not all of us have machine shops- what would you recomend as most important when someone builds a motor? all i'm saying is theres a lot more to a good running motorized bike than the port timing and configuration.find out what works and stick with that; then make a motor that holds together for a year . no mention of what brand oil you like and what ratio; i find using high quality synthetics(red- line) to be super important. etc etc
I belive I did make a video on two stroke oils tested many brands if you have the money the best has been amsoil dominator as far as bearings go skf are fine. I also have ran stock crank bearings. If your a bolt on kinda person. You can't compare a 20 $ ported stock cyl to say a mxs or Piaggio or minerell cyl. But that being said I tried all set ups from scooter cyls from 38 mm strokes to 44 mm stroke cranks to case Reed set ups . At the end of the day I preferred a 47 x 40 mm ported stock cheap junk ported by myself g2 reeds and mikuni carb and pipe. As far as how long a motor will last that depends on lot of stuff meaning if you build a engine properly and don't try riding it around at 10,000 + rpm all day long . Long lasting motors have been one set up properly 47 x 40 mm China junk with a 7 cc head out of hundreds of combos I have only had one mechanical failure. My fault to much rpm . Most miles I have ever put on a motor is about 10,000 miles I had 4 bikes at one time during my testing so it was kinda hard to put more than 10,000 miles one 1⃣ bike
ua-cam.com/users/shortspvAETEhp70M?feature=share. Simple motor with head pipe reeds carb stock crank stock cases 47 x 40 vm18 cyl stock 20$ cyl ported by me
Everything is important regardless if your building a NHRA PROSTOCK MOTORCYCLE engine or a motorized bicycle engines
Can I ask why you hate minarelli so much I went aginst you and did it and I love it now I’m super curious as to why you don’t like them
Who hates them 4 years ago I'm the guy that gave the information out that they basically would bolt on. 4 yrs ago I did All this stuff mabe 5 now from case reeds to strokers to mxs to saws. Basically went full circle back to the stock junk stuff. But just with legit porting tips. Anyone can bolt on a minerrelle cyl not everyone can get a 20$ cyl ripping. Basically I can't take any credit for bolting on a pre made cyls. But short answer would be there not ideal for in traffic or hills there eather off the power band or on the power band can't ride around all day at 11000 RPM basically
Again think about what I said anyone can bolt on a mxs or a minerellie or saw cyl and they ripp. But basically you can't take credit for it's function
Next time I'll take your clutter, 😆👽😁, ggz
Do you raise your exhaust roof to match the amount of lift you added to your cylinder or is there another equation to consider?
I always raise the exhaust roof to achieve my desired exhaust duration and blowdown & blowdown % I also make my exhaust port width 70% of bore diameter. Depending on what cyl I use. Meaning if it's a g4 cyl with off set exhaust port I will only widen it above the the blowdown ie tranfer opening got vids showing why
ua-cam.com/video/5MESp5J86XU/v-deo.html. Example of my exhaust port shape on a g4 cyl that has a offset exhaust port
@@2strokecarbtuningportingin187 I've watched a lot of your stuff very informative actually the most informative I've found. You explain things the way I can understand. I was just having a problem understanding how high to raise them and not mess things up. I understand the width and not going below the transfer openings.
@@bowmadman9562 to much of anything is never good. Small bore two strokes are sensitive. Basically porting is a big part of determining how it functions. Exhaust port width hight and roof shape kinda determines how and where the power is delivered. Along with the amount of blowdown and tranfer duration and inlet duration. Basically everything needs to work in harmony. Typically that's why I show people the math and blowdown % these aren't Yamahas Hondas or Suzukis we don't have luxury of displacement or gears. Problem I see with most folks they want to run before they learn to walk. There's 500 different routes to take to get to the same destination. When learning best advice it keep things simple less is better.two strokes are simple just misunderstood.
@@2strokecarbtuningportingin187 I used to hear this "there's no replacement for displacement"..thanks for your help I'll keep watching and learning I can tell you know your stuff