I went with a 34mm mikuni and throttle body. High compression piston, port n polish, just plus 1mm piston. It will eat a Polaris scrambler 400cc 2-stroke on take off and top end. I also changed front sprocket geared up. Back tired are 22 tall out back, and yes it tops out at over 70mph, my daughter absolutely loves riding. Also YZ 250cc reed cage, machine shop works magic. 😉
@@stevenhancock7356 DR motor he is a old 2 stroke guy Dennis Rantanen from thief river falls mn, he actually set the oil injection on the 34mm mikuni carb as well. He is almost 70 years old been a mechanic all his life. His dad use to be the Yamaha dealer in town. Plus Dennis Rantanen loves, racing mini sprints he had arctic cat help him out, he was getting 146-148 hp from 600cc arctic cat 2-stroke snowmobile engine he had a custom built his expansion chamber by hand. Very narrow but hard hit when it came on the pipe. That was back in the 90s The machine shop we use here is northern crank shafts, they can take 2 motors build a custom crank in order to join motors together. Ie.... 2 Firecat 1000cc 2-stroke monster's. Image almost 2,000cc. 4 cylinder putting out almost 400hp natural aspirated on 87 octane fuel lol.... yes it's been done here.... call northern crank shafts. There in the phone book..
@@stevenhancock7356 but wouldn't mind trying to find a old Yamaha IT 465/490 motor to build up to stick in the Yamaha blaster frame. Take me some time and money to build it right. 5 speed gear box from the IT line and increase the displacement to around 500cc but keeping the air cooled light weight 😉
@@Myndfuxx bring your scrambler 400 2-stroke to thief river falls area! I'll call my daughter and get it on video... her boyfriend has a Polaris sportsman 1000 and it actually can hang with it up to that side by side for about a city block or so....then the sportsman's slowly pulls ahead on top. This blaster isn't close to stock in any shape or form...even the transfer ports are worked.... Dennis the guy who helped build it, he has a wall of trophies from racing mini sprints Arctic Cat 2-stroke 600cc he was getting 147hp from a very narrow power band. Hand built expansion pipe, he is mr...wizard. way beyond me in understanding. He loves 2-strokes and knows how to make them faster..
I sold it last summer…. Among other sacrifices…. But starting to build up a small shop to perform racetech suspension work (SX,MX,enduro an Flat track), so not a total loss… Otherwise yeah, I would of posted more videos…. No projects this winter either…. Trying to zero debt my set up with paying all the Washingtons up front. Basically just waiting for this Minnesota weather to knock it off so I can start….
would you recommend getting a airsal cylinder with a 3mm crank or a vitos 240 kit with a 3mm crank? i don’t really feel like spending the money to get cases machined for a 4mm crank and i am planning on getting whichever cylinder ported.
Until I build my next one, I can’t say with absolute for certainty. But my money is on the Nikasil Airsal cylinder with it being plated. I’d hate to stir wrong direct, but all these high rev MX 2 strokes went to plated for a reason. Wether you used spacer plate or machined head for 3mil be personal decision. I’d think head being machined be better. I guess I’ll see on next one.
@@chrissolem2615 do you have to machine your head to fit a 3mm crank? i read on a forum that 3mm will fit right in but once you go to 4mm you have to machine your head for it to fit.
If you don’t use the spacer plate, you’ll have to. The Vito’s kit comes with a spacer plate for the cylinder base to make up for the 3mil longer stroke (to skip machining). I used the spacer plate. I posted a video of picture highlights on TH-cam, I show the plate in video.
@@barbiedollmaster6657, no, but towards the top of stroke (especially towards the back on counter balancer side), tolerance was really close. So I did round corners for piece of mind. I put cylinder on half case and rotated by hand to look it over. By rounding corners, I left enough space to where if lower rod bearing ever goes, it shouldn’t hit case. Technically you don’t need to do anything. It does fit. After pulling the engine bearings out and heating cases and pressing in new bearings, I literally put engine together on my coffee table while watching Netflix. But, with anything, there is always tolerance controls in manufacturing, so I’d do the half case and rotate to inspect that nothing rubs. But, you won’t have to send cases in anywhere. It only looked dicey towards top of stroke on my cases (still fit), I just made minor adjustment.
It sounds like your clutch is slipping in 6th gear but blasters tend to do that when you build them even with a hd clutch I had to play around with different springs until I finally got mine right
Could be… I used Vito’s clutch kit on build. I just figured 6th was just taller gear. My only real complaint on this little quad, Yamaha could of made first through third little taller and 4th through 6th a little shorter to better balance. That’s just just my opinion.
Wasn’t sticking and it fully engaged, clutch adjustment wasn’t engaged partway…. I actually had some play in clutch adjustment and needed to tighten it. If anything I jetted it lean for summer temps and took out in cold to run stable…. So, it was running almost lean enough to have dead spots in throttle. A few spots in video I do ride the clutch some to shift faster, like I would on a 125 moto…. But, mostly too lean for that cold morning…. I ran a few tanks of gas through it, kids never rode it, so I sold it last spring. I did soak plates before install. I think I have actual build video somewhere on my page…. Used new everything on build, clutch basket was good, but used new push rods, ball, inner hub and slapped Vito clutch kit in. Was a fun toy after getting more tuned with clutch….. I do have a video after jetting I could post. I’m thinking overly lean performance is what you hearing, I’ll post that video quick
Vito’s 72 bore cylinder Vito’s 3m Stroker crank Vito’s performance clutch kit Moto supply for transmission, shift, counter balancer and crank bearings Vito’s bullseye reeds 34mm carb with uni filter Toomey B1 exhaust Chain and sprocket 13/40 Rear tires are 20 by 11 Block off kit Moose racing H.O. Coils Alba wheel spacers Alba nerf bars FXR for front and rear bumper GPS on phone reads 60 mph The stock one I build ran 55… The difference I got, was a lot more torque and out of the whole speed. I still need to decide between Lectron or smart carb, now that I picked a size, but that it… Some suspension upgrades to send it as well…. We’ll see what I got after bike upgrades are done. Oh, and picking a place to send flywheel in for lightening service as well… 85% there, just handy capped by level of income.
@@chrissolem2615 Also quick question, will Vforce4 reeds work as well? I got all the other parts marked off the list and I’m just curious so I can make sure nothing goes wrong with it.
@@captainaxan4967 , Vforce4, I’d wager, they’ll produce better throttle response than the bullseye reeds… I use Vforce in my Rm250, in my CR125R and in the cr85 I built for my wife. I only bought the bullseye reeds out of curiosity (and they had unique design that had me curious). If I purchased again, I would go vforce…
I didn’t feel any slip. I used Vito’s clutch kit (supposedly rated for up to 100 hp), quad probably put out 40 at crank n thirty something at wheels, if I had to guess. I’m sure I could of located better plates.
Sprocket ratio 13/40, rear tires 20” by 11”… I get a hair over 60 on gravel. I weigh 285lbs. The difference after all the mods, is it actually has some get up and go (actual acceleration, compared to stock build). If you wanted to add teeth to the front, you’d get more top end if that’s your goal. If you wanted 70, you’d need a 15 tooth in front (a stock engine won’t wind that ratio out, I has a 14/40 on fresh stock build and it struggled to carry sixth gear). Hopefully my response dialed you in to what you wanted to know. You can always give up torque for speed, as long as engine can carry.
I’ve wanted to go there, ever since I was a young teen in the mid 90’s (sitting on couch watching Crusty Demons of Dirt😎). One of these days…. I should probably go within next 5 years, I’m turning 40 next month.
I tried advanced and standard, considering I ran standard with 91, leaving Timing on standard it ran better. The main thing the quad needed after using Vito’s 72mm bore stroker kit, was a bigger carb, the stock carb bore of only 28mm proved it can’t throw enough air with fuel…. I used a 34mm Keihn style carb with mount on filter, also, stock exhaust held itself back from fully opening up (I went slightly cheaper with a Toomey B1, like 500 bucks).
Sounds good , awesome video been looking for a big bore blaster pov video for a while good stuff!
love the quad great work man sounds sweet
I went with a 34mm mikuni and throttle body. High compression piston, port n polish, just plus 1mm piston. It will eat a Polaris scrambler 400cc 2-stroke on take off and top end. I also changed front sprocket geared up. Back tired are 22 tall out back, and yes it tops out at over 70mph, my daughter absolutely loves riding. Also YZ 250cc reed cage, machine shop works magic. 😉
Where’d you get the port and polish done?
@@stevenhancock7356 DR motor he is a old 2 stroke guy Dennis Rantanen from thief river falls mn, he actually set the oil injection on the 34mm mikuni carb as well. He is almost 70 years old been a mechanic all his life. His dad use to be the Yamaha dealer in town. Plus Dennis Rantanen loves, racing mini sprints he had arctic cat help him out, he was getting 146-148 hp from 600cc arctic cat 2-stroke snowmobile engine he had a custom built his expansion chamber by hand. Very narrow but hard hit when it came on the pipe. That was back in the 90s The machine shop we use here is northern crank shafts, they can take 2 motors build a custom crank in order to join motors together. Ie.... 2 Firecat 1000cc 2-stroke monster's. Image almost 2,000cc. 4 cylinder putting out almost 400hp natural aspirated on 87 octane fuel lol.... yes it's been done here.... call northern crank shafts. There in the phone book..
@@stevenhancock7356 but wouldn't mind trying to find a old Yamaha IT 465/490 motor to build up to stick in the Yamaha blaster frame. Take me some time and money to build it right. 5 speed gear box from the IT line and increase the displacement to around 500cc but keeping the air cooled light weight 😉
its not going to beat a scrambler takeoff ...
@@Myndfuxx bring your scrambler 400 2-stroke to thief river falls area! I'll call my daughter and get it on video... her boyfriend has a Polaris sportsman 1000 and it actually can hang with it up to that side by side for about a city block or so....then the sportsman's slowly pulls ahead on top. This blaster isn't close to stock in any shape or form...even the transfer ports are worked.... Dennis the guy who helped build it, he has a wall of trophies from racing mini sprints Arctic Cat 2-stroke 600cc he was getting 147hp from a very narrow power band. Hand built expansion pipe, he is mr...wizard. way beyond me in understanding. He loves 2-strokes and knows how to make them faster..
Baby SHee !!!!
Please post more pov videos of you riding this blaster!! Runs great!
I sold it last summer…. Among other sacrifices…. But starting to build up a small shop to perform racetech suspension work (SX,MX,enduro an Flat track), so not a total loss… Otherwise yeah, I would of posted more videos…. No projects this winter either…. Trying to zero debt my set up with paying all the Washingtons up front. Basically just waiting for this Minnesota weather to knock it off so I can start….
That thing sounds sweet!
would you recommend getting a airsal cylinder with a 3mm crank or a vitos 240 kit with a 3mm crank? i don’t really feel like spending the money to get cases machined for a 4mm crank and i am planning on getting whichever cylinder ported.
Until I build my next one, I can’t say with absolute for certainty. But my money is on the Nikasil Airsal cylinder with it being plated. I’d hate to stir wrong direct, but all these high rev MX 2 strokes went to plated for a reason. Wether you used spacer plate or machined head for 3mil be personal decision. I’d think head being machined be better. I guess I’ll see on next one.
@@chrissolem2615 do you have to machine your head to fit a 3mm crank? i read on a forum that 3mm will fit right in but once you go to 4mm you have to machine your head for it to fit.
If you don’t use the spacer plate, you’ll have to. The Vito’s kit comes with a spacer plate for the cylinder base to make up for the 3mil longer stroke (to skip machining). I used the spacer plate. I posted a video of picture highlights on TH-cam, I show the plate in video.
@@chrissolem2615 for the 3mm stroker do you have to machine the cases at all?
@@barbiedollmaster6657, no, but towards the top of stroke (especially towards the back on counter balancer side), tolerance was really close. So I did round corners for piece of mind. I put cylinder on half case and rotated by hand to look it over. By rounding corners, I left enough space to where if lower rod bearing ever goes, it shouldn’t hit case. Technically you don’t need to do anything. It does fit. After pulling the engine bearings out and heating cases and pressing in new bearings, I literally put engine together on my coffee table while watching Netflix. But, with anything, there is always tolerance controls in manufacturing, so I’d do the half case and rotate to inspect that nothing rubs. But, you won’t have to send cases in anywhere. It only looked dicey towards top of stroke on my cases (still fit), I just made minor adjustment.
It sounds like your clutch is slipping in 6th gear but blasters tend to do that when you build them even with a hd clutch I had to play around with different springs until I finally got mine right
Could be… I used Vito’s clutch kit on build. I just figured 6th was just taller gear. My only real complaint on this little quad, Yamaha could of made first through third little taller and 4th through 6th a little shorter to better balance. That’s just just my opinion.
@@chrissolem2615 you are right they should've geared it like that it would've made it much better
What did you do to timing to make it run
You're clutches ar seased together. Or clutch needs more play
If u just installed that you're destroying it. U can't leave it were it was adjusted before its hanging
Wasn’t sticking and it fully engaged, clutch adjustment wasn’t engaged partway…. I actually had some play in clutch adjustment and needed to tighten it. If anything I jetted it lean for summer temps and took out in cold to run stable…. So, it was running almost lean enough to have dead spots in throttle. A few spots in video I do ride the clutch some to shift faster, like I would on a 125 moto…. But, mostly too lean for that cold morning…. I ran a few tanks of gas through it, kids never rode it, so I sold it last spring. I did soak plates before install. I think I have actual build video somewhere on my page…. Used new everything on build, clutch basket was good, but used new push rods, ball, inner hub and slapped Vito clutch kit in. Was a fun toy after getting more tuned with clutch….. I do have a video after jetting I could post. I’m thinking overly lean performance is what you hearing, I’ll post that video quick
Jetting 244 stroker Blaster…. I uploaded it….
Sweet quad I got a 2mm+ crank on mine and I’m looking for a little bit more power, mind listing the top speed and all the parts you put on it? Thanks.
Vito’s 72 bore cylinder
Vito’s 3m Stroker crank
Vito’s performance clutch kit
Moto supply for transmission, shift, counter balancer and crank bearings
Vito’s bullseye reeds
34mm carb with uni filter
Toomey B1 exhaust
Chain and sprocket 13/40
Rear tires are 20 by 11
Block off kit
Moose racing H.O. Coils
Alba wheel spacers
Alba nerf bars
FXR for front and rear bumper
GPS on phone reads 60 mph
The stock one I build ran 55…
The difference I got, was a lot more torque and out of the whole speed. I still need to decide between Lectron or smart carb, now that I picked a size, but that it… Some suspension upgrades to send it as well…. We’ll see what I got after bike upgrades are done. Oh, and picking a place to send flywheel in for lightening service as well… 85% there, just handy capped by level of income.
I do also, have a rebuild video I posted, before I added bigger intake and carb….
@@chrissolem2615Thanks, I’ll look at all these parts tonight.
@@chrissolem2615 Also quick question, will Vforce4 reeds work as well? I got all the other parts marked off the list and I’m just curious so I can make sure nothing goes wrong with it.
@@captainaxan4967 , Vforce4, I’d wager, they’ll produce better throttle response than the bullseye reeds… I use Vforce in my Rm250, in my CR125R and in the cr85 I built for my wife. I only bought the bullseye reeds out of curiosity (and they had unique design that had me curious). If I purchased again, I would go vforce…
I just bought this kit. I hope it was worth the $850 I spent on it.
Bigger carb and some aftermarket exhaust, and it’s good… A lot better than stock, but it still isn’t a Banshee.
@@chrissolem2615 I have the Vito's performance "fat bastard" exhaust already. I guess I'll look into a lectron carb or something. Thanks for the tips.
U got way more power get r son
👊
Clutch sort of sounds likes it’s slipping
I didn’t feel any slip. I used Vito’s clutch kit (supposedly rated for up to 100 hp), quad probably put out 40 at crank n thirty something at wheels, if I had to guess. I’m sure I could of located better plates.
@@chrissolem2615 could’ve just been the video Vito’s is what I had in mine.
THE clutch is slipping so bad I wouldn't ride it until I fixed it.
@@quadfather44 , possibly, I put new clutch in when I rebuilt it (vito's plates and springs) Sold it a couple years ago.
Top speed?
Sprocket ratio 13/40, rear tires 20” by 11”… I get a hair over 60 on gravel. I weigh 285lbs. The difference after all the mods, is it actually has some get up and go (actual acceleration, compared to stock build). If you wanted to add teeth to the front, you’d get more top end if that’s your goal. If you wanted 70, you’d need a 15 tooth in front (a stock engine won’t wind that ratio out, I has a 14/40 on fresh stock build and it struggled to carry sixth gear). Hopefully my response dialed you in to what you wanted to know. You can always give up torque for speed, as long as engine can carry.
Sleeping clutch
Is that a question? I’m confused? I used Vito’s performance clutch kit when I built quad; or are you asking about slipping clutch issues?
Can you rebulid mine with the same set up you have on yours
i can
bring it to the sand dunes glamis, usa
I’ve wanted to go there, ever since I was a young teen in the mid 90’s (sitting on couch watching Crusty Demons of Dirt😎). One of these days…. I should probably go within next 5 years, I’m turning 40 next month.
What did you do to timing to make it run
I tried advanced and standard, considering I ran standard with 91, leaving Timing on standard it ran better. The main thing the quad needed after using Vito’s 72mm bore stroker kit, was a bigger carb, the stock carb bore of only 28mm proved it can’t throw enough air with fuel…. I used a 34mm Keihn style carb with mount on filter, also, stock exhaust held itself back from fully opening up (I went slightly cheaper with a Toomey B1, like 500 bucks).