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Post by xyshannen on Oct 25, 2014 8:17:24 GMT -5
tvnacman The red is krylon for plastic the black is just good ol walmart 99 cent special. I didn't put any paint on the lower half of the engine or the cylinder jug since they get the hottest and I didn't want anything interfering with the engines ability to cool. How long it last's doesn't matter to me since, if all goes right, the entire engine will be replaced by spring. I did however at least prep the surface right by giving it a good scrubbing with dish soap to remove any oil and road grime, followed by a light sanding. I do like it so much that I plan on using better paint on the next engine. justbuggin2 LOL! I have to take it a little bit easy for now. My brand new stock clutch is slipping at high RPMS. It obviously isn't designed to withstand this much POW. New clutch will be ordered in a week or so.
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Post by dmartin95 on Nov 1, 2014 16:32:42 GMT -5
The video is coming up as private and I can't view it. Doh! Sorry, first utube video ever. Should work now. Just watched the video.... She sounds nice! Good Job! |
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Post by xyshannen on Nov 1, 2014 16:53:03 GMT -5
Thanks! I need to work on the exhaust a lil more. It's got a pfft pfft sounds because I removed the glass from the muffler and cut it down 3 inches so it wouldn't hit my rear body panels. There is still a couple of inches of the internal pipe that's full of holes left on the tip end. So I'm going to cut the rest of that pipe off and see if I can't open the exit hole up a bit more.
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Post by dmartin95 on Nov 1, 2014 22:50:06 GMT -5
Thanks! I need to work on the exhaust a lil more. I would be so lost when it comes to how much air flow/restriction a 150cc engine needs... If I ever attempted a BBK, it would have to be plug n play basically.... Even though my motor is a "BN", the president of Bintelli contacted me on this forum and gave me some details about my engine and it is in fact an "A" case motor with 54mm spacing... Max I think I can bore it without a stroker is 180cc based on this chart I found. Stock GY-6 57.4mm x 57.8mm = 149.6cc Big Bore KIT 58.5mm x 57.8mm = 155.4cc 59mm x 57.8mm = 158cc 60mm x 57.8mm = 163.4cc 61mm x 57.8mm = 168.9cc 62mm x 57.8mm = 174.5cc 63mm x 57.8mm = 180.2cc +8.2mm Stroker Crank 57.4mm x 66mm = 170.8cc 58.5mm x 66mm = 177.4cc 59mm x 66mm = 180.4cc 60mm x 66mm = 186.6cc 61mm x 66mm = 192.9cc 62mm x 66mm = 199.3cc 63mm x 66mm = 205.7cc --------------------------------- In the event that I did bore up to a 180cc, could I use my stock carb simply by upjetting it? What about if I got a stroker and went up to a 205.7cc?? Could I still use the same carb? |
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Post by dmartin95 on Nov 1, 2014 22:53:33 GMT -5
Oh yeah, I got sidetracked with the cc's of my engine... You mentioned the exhaust on yours... The reason I'm even thinking about a BBK is because I wound up getting a performance exhaust by accident... I had it added to my shopping cart when I checked out... Once I got it, I think it's so pretty, I would really like to use it.....   Right now it's just sitting in a drawer in my garage.... |
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Post by scooter on Nov 2, 2014 1:16:01 GMT -5
+8.2mm Stroker Crank 57.4mm x 66mm = 170.8cc 58.5mm x 66mm = 177.4cc Wow that's a nice 20cc leap just by adding the crank to the stock cylinder. |
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Freshman Rider
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Posts: 61 
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Joined: Oct 30, 2014 23:50:17 GMT -5
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Post by ccr on Nov 2, 2014 3:09:26 GMT -5
small carbs give quick throttle response.
bigger carbs give better mid range and top end power.
a cvk 28 will give good enough top end for up to about 180cc.
chances are that your carb is a cvk28 if it's 150cc stock.
just re jet if that's the case.
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Post by xyshannen on Nov 2, 2014 11:56:43 GMT -5
small carbs give quick throttle response. bigger carbs give better mid range and top end power. a cvk 28 will give good enough top end for up to about 180cc. chances are that your carb is a cvk28 if it's 150cc stock. just re jet if that's the case. Nope... The 150cc GY6 comes with a 24mm carb. dmartin95 It depends a lot on how much modification you want to do. If all you do is put a BBK on and don't do any porting to your head, then you can run a 26mm carb up to, I'd guess about 180cc. Ally is running a 26mm carb in his stroker setup. I'm positive the combination of porting the crap out of my head and the tunnel ram intake are what's letting me get away with running a 30mm carb and it performing like it does. It's gives great throttle response and runs like a bat out of h*ll. The stock 40 pilot jet and 125 main jet were too small, causing me to run lean. But having said that, yesterday we had a cold snap where it got down into the low 40s causing me to run a little rich. Can you link me to this CC graph you found? |
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Post by dmartin95 on Nov 2, 2014 12:14:06 GMT -5
Can you link me to this CC graph you found? Yeah, Here's the link . It's the second post in that thread. As of right now, I don't really have a plan.... I'm not sure if I'm going to do a BBK or not.... I would like to have a little more power, not speed.... I have added saddlebags, extra large trunk and carry tools.... All my extras are about 50lbs.... In addition, I'm adding a windshield and the wind resistance will no doubt slow me further. The fastest my scooter ever went on level terrain was 62MPH stock.... Right now, she maxes out 58~59MPH and the windshield will push that down further. If I could get to a steady 65MPH and more power I would be one happy camper! |
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Post by xyshannen on Nov 2, 2014 12:19:23 GMT -5
dmartin95 You might be interested is the 60mm BBK that RCQ is using from GY6 raceteam on ebay.
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Post by dmartin95 on Nov 2, 2014 12:24:19 GMT -5
Got a link?
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Post by xyshannen on Nov 2, 2014 14:36:35 GMT -5
Of coures www.ebay.com/itm/SCOOTER-GY6-HIGH-PERFORMANCE-TAIWAN-60MM-CYLINDER-KIT-CYLINDER-HEAD-CAMSHAFT-/181564749082?vxp=mtrWith this kit you get to choose what cam you get. Wile I like the A11 I have, I would really like to try the A8. Since I'm like you and not worried about top speed, it should have better power at lower RPMs, always being at 6500 get's annoying at slower speeds. I had 10 ounce rollers in and it had the motor operating in the perfect power band starting dead at 6500 to 8000. I put the stock 12 grams back in and it doesn't hit the power band until I'm almost running 40. But will still hit 60 and has plenty of power to go at only 7200 RPMs. Forgot to say; I really like that exhaust. I would love to but can't put one like that on my scoot. Like the one I have it would point the muffler right into my body panel.. I had to cut 3 inches off of mine and it still hits when I hit a bump. I would be afraid to cut one like ours, It would probably flub it up. |
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Post by dmartin95 on Nov 4, 2014 0:14:04 GMT -5
With this kit you get to choose what cam you get. Wile I like the A11 I have, I would really like to try the A8. Since I'm like you and not worried about top speed, it should have better power at lower RPMs, always being at 6500 get's annoying at slower speeds. I had 10 ounce rollers in and it had the motor operating in the perfect power band starting dead at 6500 to 8000. I put the stock 12 grams back in and it doesn't hit the power band until I'm almost running 40. But will still hit 60 and has plenty of power to go at only 7200 RPMs. Are you saying the lowest RPM your scooter runs at is 6500? What does the numbers for the cam mean? What is the difference between an A11 and an A8? That's something else I don't know about yet is how the cvt, rollers and clutch all work together.. I would have no idea what to select...... |
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Post by xyshannen on Nov 4, 2014 9:46:35 GMT -5
dmartin95 I went by this handy graph a fellow forum member made. wildswede.se/Baotian/Cam_horsepower2.jpgYou can see the difference between all the cams and how they should perform at what RPM. On the chart, the higher the line on the left the more low end torque the cam has and the higher it is on the right shows how much pull the cam will have until it peeks then starts to taper off. No my motor idles at about 1700 but as soon as I hit the gas I'm cruising at 65K @ 25 MPH. The lighter rollers I put in allowed the motor to operate at a higher RPM, To tone it down some I went back to the stock 12 gram weights. Now I can cruise at a lower RPM before getting into the power band of my cam. As far as roller weights and your CVT, it's just a matter of trial and error. Different rider weights and size all have an effect on how much RPMS your roller weights will allow your motor to run. They are cheap enough that it's not a huge deal to buy a couple of different sizes and try them out. Most start at 12 grams and go from there.
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