SlowMoe Posted January 14, 2017 Report Posted January 14, 2017 So my sons blaster was 100% stock. The power came on super early and had a nice midrange punch but fell FLAT on its face in the top end. So I was bored yesterday and decided to do a little grinding to wake up the top end. Upon removing the cylinder I discovered that 2 transfer ports has a decent amount of mismatch and that one of them was about 30% blocked with aluminum. Horrible. The exhaust port also had a LOT of aluminum where it shouldnt have been, mainly along the roof. I bet it affected the timing by about 3-5 degrees. So what I did was: -lowered the intake port about 3mm, narrowed the bridge about 2-3 mm -Smoothed out the transfer entrancesm cleaned up the area near the windows and made sure everything matched up nicely. Didn't change transfer timing at all -cleaned up the flashing from the exhaust, and raised the roof about 2mm in the center and about 4mm on the corners (squared it up a bit) You wouldnt believe how much better the top end is. Fro having a stock pipe it revs out nicely, and once on the pipe the powerband feels super linear. I bet its as fast as a piped blaster with no port work, and has a MUCH wider powerband I tried to take before and after pics but they didnt come out too great, I'll post them up in a minute Quote
SlowMoe Posted January 14, 2017 Author Report Posted January 14, 2017 (edited) Transfer before Edited January 14, 2017 by SlowMoe Quote
SlowMoe Posted January 14, 2017 Author Report Posted January 14, 2017 Ok for some reason I cant upload any more pics. What the hell Quote
bigweav81 Posted January 14, 2017 Report Posted January 14, 2017 Try tapatalk. Any before pics? Sent from my SM-S820L using Tapatalk Quote
bigweav81 Posted January 14, 2017 Report Posted January 14, 2017 Lol, I didn't realize that intake was the before pic.....I thought damn must be a conservative fella. Sent from my SM-S820L using Tapatalk Quote
sleeper06 Posted January 14, 2017 Report Posted January 14, 2017 I'll tell you what , last time I ported a blaster I had to remove a ton of material to get to my liking. I ran a shearer pipe and a 35 pwk Quote
bigweav81 Posted January 14, 2017 Report Posted January 14, 2017 Is that by chance a niche cylinder? Sent from my SM-S820L using Tapatalk Quote
SlowMoe Posted January 14, 2017 Author Report Posted January 14, 2017 Thats a stock cheap chinese cylindedr as evidenced by the excessive blockages in the ports Quote
bigweav81 Posted January 14, 2017 Report Posted January 14, 2017 Figured so. I have a set of niche for a banshee, and I'll be grinding on them before to long.....they to have shitty casting in the intake, and other problems lol. Sent from my SM-S820L using Tapatalk Quote
SlowMoe Posted January 15, 2017 Author Report Posted January 15, 2017 Yep. Huge difference from just a clean up port job Quote
SlowMoe Posted January 15, 2017 Author Report Posted January 15, 2017 Probably a good 5 hp on top Quote
bigweav81 Posted January 15, 2017 Report Posted January 15, 2017 Yep. Huge difference from just a clean up port jobTapatalk is easy way to upload photos...... Sent from my SM-S820L using Tapatalk Quote
sleeper06 Posted January 15, 2017 Report Posted January 15, 2017 I was very surprised how well that little blasty ran. It was for a 12 yr old , one of my sons friends. That little machine held its own against anything he ran, the kid is def a good rider for his age . I converted the braking system to Banshee components and stepped up the control arms and suspension. Ended up being a well balanced machine with power like a 250r 1 Quote
bigweav81 Posted January 15, 2017 Report Posted January 15, 2017 Maybe I'll pick one up to tinker on. Get a blaster all day around here for $300-$750. Be a great bike for my midget wife. Sent from my SM-S820L using Tapatalk Quote
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