The road sign tells us this is at about 5000 ft elevation. At lower altitudes it may even be a little better performing. Interesting, now the whole rig has to cost less or equal to a 250 factory equivalent to “make sense”! This would be a great small bore hop-up kit to immortalize. Too bad the back ad pages in Cycle magazine don’t exist anymore. This would be an iconic advertisement opportunity. We need to see more about the build, just saying.
@@Simulera thanks for watching and subbing if that was you! This setup can be had for around $700 with decent parts. The reason I invested in doing this was because of the seat height for my wife to be able to ride. She wasn’t comfortable with a 250 and thought it would actually do 70mph like advertised but we were lied to lol. 55mph was doable. Now it’ll climb any hill no matter the elevation and how long the hill might be. Stock it would drop to 45mph and I’d have to downshift. I should’ve shown more before taking it apart to do the 78mm 300cc stroker build. I should have a new video of that soon.
@ interesting! Now you need to upgrade the brakes and install a fork brace! Very cool. It will be interesting to hear about engine durability and transmission wear too.
@Simulera yeah, the suspension, brakes, wheels and tires will all get upgraded eventually. I will definitely add a steering dampener. I plan on WPC treating a lot of parts to try and help with durability. I’m also planning on adding an oil cooler and filter.
@@dr.x4050 thanks for watching! Definitely with just the big bore it’ll do 65mph. It would still drop going up really large hills though. The head really let it breathe up top.
@@markbonneville5402 I’m not really sure honestly. I didn’t think it had enough power stock to have utilized the 18t or the 46t. When the bike was stock I tried to buy an 18t and couldn’t find one at the time that fit so instead I gave it more power. I also weigh probably north of 200lbs and am at an elevation of around 5500’, so that doesn’t help either lol.
@@detectorfieldtests414 thanks for watching and subbing if that was you. I had only put a couple hundred miles on it after the build before taking the parts off for the 300cc build. I think I was getting between 80-85 mpg and when it was stock I was getting 100mpg. I wasn’t really trying to baby it though and was giving it the beans everywhere lol.
@@fazlerabby6510 stock speed with me on flat ground was 60 mph, so 28 mph more. I didn’t record fuel mileage before disassembly of 70mm but my guess would be around 75-80 mpg. Stock was 100 mpg. I did not need to cut or machine the crankcase. 70mm is probably largest before machining or cutting is done. 78mm I’m installing for 300cc will need to be cut or machined.
@@DustySteel Thank you so much for your response.my bike is cbz xtreme which had the same engine as xr150.My bikes stock top speed around 130.with racing coil,plug,cdi,exhaust,airfilter I got almost 138 with 43-14 sprockets.please give some suggests to increase 20/22kmph more so i could hit 160kmph.
@ I’ll have to learn about cbz xtreme because I want rear hub to be 43. If you want more top speed and have the horsepower to do it then I would go up with the 14t to 15t, 16t, or 17t. I’m using 18t/46t.
@@Xr150hobbys yeah SXParts is sold out of the 36/31, are they sold out of the smaller size? If not then go with the smaller size one. I went with a stage 3 cam. The head came with the intake manifold. You can just search for a BRT Racing CR 150 head and you should be able to find them also on the bay website.
@@DustySteel thank so much I’m still unsure if I wanna do it’s but I wanna get pricing and parts and no not good enough to know what will work and what won’t
@@RolandDeLossantos-hw3mg yeah I agree and I’m running out of gear not power. With this setup I was using the stock crank/rod. 222cc with a 70mm piston and a 36/31 head.
The road sign tells us this is at about 5000 ft elevation. At lower altitudes it may even be a little better performing. Interesting, now the whole rig has to cost less or equal to a 250 factory equivalent to “make sense”! This would be a great small bore hop-up kit to immortalize. Too bad the back ad pages in Cycle magazine don’t exist anymore. This would be an iconic advertisement opportunity. We need to see more about the build, just saying.
@@Simulera thanks for watching and subbing if that was you! This setup can be had for around $700 with decent parts. The reason I invested in doing this was because of the seat height for my wife to be able to ride. She wasn’t comfortable with a 250 and thought it would actually do 70mph like advertised but we were lied to lol. 55mph was doable. Now it’ll climb any hill no matter the elevation and how long the hill might be. Stock it would drop to 45mph and I’d have to downshift. I should’ve shown more before taking it apart to do the 78mm 300cc stroker build. I should have a new video of that soon.
@ interesting! Now you need to upgrade the brakes and install a fork brace! Very cool. It will be interesting to hear about engine durability and transmission wear too.
@Simulera yeah, the suspension, brakes, wheels and tires will all get upgraded eventually. I will definitely add a steering dampener. I plan on WPC treating a lot of parts to try and help with durability. I’m also planning on adding an oil cooler and filter.
Great demonstration. It looks like, with just the big-bore, the bike can cruise easily at 65mph.
@@dr.x4050 thanks for watching! Definitely with just the big bore it’ll do 65mph. It would still drop going up really large hills though. The head really let it breathe up top.
@@dr.x4050 I have my parts list in the description.
So what would it get with just the sprocket I get 73 on as is. So id like to know what it get with just sprockets
@@markbonneville5402 I’m not really sure honestly. I didn’t think it had enough power stock to have utilized the 18t or the 46t. When the bike was stock I tried to buy an 18t and couldn’t find one at the time that fit so instead I gave it more power. I also weigh probably north of 200lbs and am at an elevation of around 5500’, so that doesn’t help either lol.
I want to do the big bore, would it be reliable for a trip to Alaska
Super cool, thanks for sharing!
@@suitandtiedye thank you for watching and subbing, if that was you. I really appreciate it. I should have the next video out soon of the 300cc build.
Thanks for watching and supporting the channel! Parts list with this 222cc setup is in the description.
😮 Wat is ur sprocket set??👍
@@alrahiminkenoh7786 18t/46t. Thanks for watching and subbing.
@@DustySteel i like it... Thinking of making mine lyk that.🇵🇭
What type of fuel economy are you seeing after the mods? Thank you.
@@detectorfieldtests414 thanks for watching and subbing if that was you. I had only put a couple hundred miles on it after the build before taking the parts off for the 300cc build. I think I was getting between 80-85 mpg and when it was stock I was getting 100mpg. I wasn’t really trying to baby it though and was giving it the beans everywhere lol.
Top speed how much increased than stock?How much mileage you are getting in 1 liter?Did you cut the crankcase for 70mm big bore kit?
@@fazlerabby6510 stock speed with me on flat ground was 60 mph, so 28 mph more. I didn’t record fuel mileage before disassembly of 70mm but my guess would be around 75-80 mpg. Stock was 100 mpg. I did not need to cut or machine the crankcase. 70mm is probably largest before machining or cutting is done. 78mm I’m installing for 300cc will need to be cut or machined.
@@fazlerabby6510 thank you very much for watching and subbing if that was you. It’s very appreciated.
@@DustySteel Thank you so much for your response.my bike is cbz xtreme which had the same engine as xr150.My bikes stock top speed around 130.with racing coil,plug,cdi,exhaust,airfilter I got almost 138 with 43-14 sprockets.please give some suggests to increase 20/22kmph more so i could hit 160kmph.
@ I’ll have to learn about cbz xtreme because I want rear hub to be 43. If you want more top speed and have the horsepower to do it then I would go up with the 14t to 15t, 16t, or 17t. I’m using 18t/46t.
@@fazlerabby6510 you’re welcome!!😎
I finally found the head u put on it but it’s out of stock
Did u change the cam? R just big bore piston and valve
@@Xr150hobbys yeah SXParts is sold out of the 36/31, are they sold out of the smaller size? If not then go with the smaller size one. I went with a stage 3 cam. The head came with the intake manifold. You can just search for a BRT Racing CR 150 head and you should be able to find them also on the bay website.
@@Xr150hobbys I updated the parts lists in the description.
@@DustySteel thank so much I’m still unsure if I wanna do it’s but I wanna get pricing and parts and no not good enough to know what will work and what won’t
@@Xr150hobbys if you join the fb group, @Katie Jackson is selling their kit because they want to go even bigger.
@@DustySteel I don’t have fb lol but thanks
That is fast for an xr 150, but did u changed the connecting rod or your still using the original one? Thank u.
@@RolandDeLossantos-hw3mg yeah I agree and I’m running out of gear not power. With this setup I was using the stock crank/rod. 222cc with a 70mm piston and a 36/31 head.
@@RolandDeLossantos-hw3mg thanks for watching and subbing, if that was you!😎👍
Are you running it with the 18 tooth front sprocket in this video.?
@@JamesWorrall-l1v yessir!! Thanks for watching! The mod list is in the description.
Can you try a 16T -49 T sprocket ?
@@UikoSlyZerna once I’m done with the 300cc build?
@@UikoSlyZerna thanks for watching and subbing, if that was you.
how about the vibration?
@@orlandobarros4235 thanks for watching and subbing, if that was you. The vibration is the same as stock.
Kewl! What are the mods to get here?
@@ShanenDanaShoemaker-wf4tr I updated the mods list in the description. Thanks for watching!
@@ShanenDanaShoemaker-wf4tr also thank you for sharing one of my early videos in a forum.