hi guys i am after some advice on porting my vision motor but i want to keep it 49cc i have done some mild two stroke porting before on my other bikes but i have never touched a scooter before. my inlet ports seem to be quite restricted by the skirt of the barrel/jug am i right in thinking i should take that away to allow it to breathe a bit more any porting advice would be much appreciated.
porting advice please!!
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porting advice please!!
Speed is a question of money, How fast do ya wanna go?!
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
- patthesoundguy
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Re: porting advice please!!
Here is what I like to do to stock cylinders.
Take away all of the casting imperfections and transition everything nicely. Then finish it all with with the Stone to get the right texture on it. Raising the exhaust port a little will really help wake it up along with opening it up a bit and improving the transition from rectangle to round .. Have a lookaat the intake tube as well they usually have wacky casting flaws and are way too shiny. The intake windows on the block always need better transitioning as well. Here is a spree intake for example.
Spree block before and after.
Take away all of the casting imperfections and transition everything nicely. Then finish it all with with the Stone to get the right texture on it. Raising the exhaust port a little will really help wake it up along with opening it up a bit and improving the transition from rectangle to round .. Have a lookaat the intake tube as well they usually have wacky casting flaws and are way too shiny. The intake windows on the block always need better transitioning as well. Here is a spree intake for example.
Spree block before and after.
Dude! Ya Can't Fix Stupid!
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
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Re: porting advice please!!
hi thanks for a fast reply but that does not look like the engine i have in my bike i think it my be an af05 ?? i will post pis later today.
Speed is a question of money, How fast do ya wanna go?!
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
- patthesoundguy
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Re: porting advice please!!
Might not be the same block or cylinder but the process is totally the same
Dude! Ya Can't Fix Stupid!
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
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- Noob
- Posts: 9
- Joined: Mon Aug 25, 2014 4:24 pm
- Location: shropshire uk
Re: porting advice please!!
ive been busy in the shed today with the dremel tool here is what i have done to the ports on the barrel/jug
i think it should to the trick
i think it should to the trick
Speed is a question of money, How fast do ya wanna go?!
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
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Re: porting advice please!!
Have you ran the bore yet? What were the results?
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'89 Honda Elite E - SOLD
'86 Honda Spree - TRADED
'98 Honda EK coupe - SOLD
'86 Honda Spree - BOUGHT BACK/SOLD
'05 Arnada - CURRENT/UNDERCONSTRUCTION
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Re: porting advice please!!
not yet i am hoping to here it run tomorrow going to run it on a dellorto phbg19mm with home made expansion chamber to suit the porting. hopefully it should have a bit of poke in comparison to a stock visionHELLAFLUSHED! wrote:Have you ran the bore yet? What were the results?
Speed is a question of money, How fast do ya wanna go?!
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
88 donor vision
93 special vision build in progress
88 yamaha fs1e racer
- Trafficjamz
- CBR1000RR
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Re: porting advice please!!
I'm sure you will feel a poke.
in the ear
hahaha i keed i keed.
the stock exhaust is the biggest restriction on that scooter.
the stock transmisson needs to be addressed before the butt dyno numbers change.
in the ear
hahaha i keed i keed.
the stock exhaust is the biggest restriction on that scooter.
the stock transmisson needs to be addressed before the butt dyno numbers change.
new best 1/8th mile time 9.647 seconds @67.155 mph 310lbs total weight