- Location
- South Africa
thanks mate all im missing now is the lever but a billet mirror copy to my throttle lever at least that will match
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Super Jet newb from Africa
- Thread starter Poizen
- Start date
- Location
- South Africa
more parts ordered from jetmanic to convert ym 701 to a semi raging 760
- Location
- South Africa
picked up a spare set of 61x cylinders wow you can see why these motors battle to breath look how mis matched the ports are
staring to port now lets hope i can make a ripper
staring to port now lets hope i can make a ripper
- Location
- Delray Beach, FL
Good stuff. Enjoying the progress updates!
- Location
- South Africa
small update started porting
im worried my mate said it took him a week this took me a hour or so
it still needs some cleaning up
the exhaust port i didnt go wild on because with my budget i need things to be reliable and last forever
also i know they say exhaust port should be round 60-70% of piston dia thats huge and my one friend that did that caught rings.. plus doesn't that cause a bottle neck affect because your exhaust manifold isnt that large
anywhoo mindless rambling here are the pics
tell me what ive missed etc
im worried my mate said it took him a week this took me a hour or so
it still needs some cleaning up
the exhaust port i didnt go wild on because with my budget i need things to be reliable and last forever
also i know they say exhaust port should be round 60-70% of piston dia thats huge and my one friend that did that caught rings.. plus doesn't that cause a bottle neck affect because your exhaust manifold isnt that large
anywhoo mindless rambling here are the pics
tell me what ive missed etc
- Location
- South Africa
I have never had a problem with rings with exhaust width at 67%. Radius on corners should be +-12mm. Porting mid to top of exhaust will boost power while on slightly raising peak hp rpm(more hit), porting mid to bottom raises peak hp rpm. You seemed to have done both which will give more hp but further up the rpm range.
You need to port further down on transfers as you will have created a bit of a hourglass shape which will disturb gas flow. In the Boost port pic(last pic) you can see a bump that needs to be blended out
You need put more bevel than standard on exhaust port to stop rings snagging
You need to port further down on transfers as you will have created a bit of a hourglass shape which will disturb gas flow. In the Boost port pic(last pic) you can see a bump that needs to be blended out
You need put more bevel than standard on exhaust port to stop rings snagging
- Location
- South Africa
this is still a rough port and my first attempt
i dont know if its just the pics but when i look down the boost port there is no lump its a perfect ramp ill try take a diff pic but
will play some more tonight again
i dont know if its just the pics but when i look down the boost port there is no lump its a perfect ramp ill try take a diff pic but
will play some more tonight again
- Location
- South Africa
Pretty good for a first time.
If you bake the cylinders in the oven, you can tap the sleeves out with a nylon mallet. Transfers can then we checked/reworked easily. To put sleeves back in, put them in freezer, cylinder in oven. push/tap sleeves in and centre. Bolt on head and allow to cool.
If you bake the cylinders in the oven, you can tap the sleeves out with a nylon mallet. Transfers can then we checked/reworked easily. To put sleeves back in, put them in freezer, cylinder in oven. push/tap sleeves in and centre. Bolt on head and allow to cool.
- Location
- South Africa
played abit again tonight
smoothed out the boost port even more now it has a real good ramp
then smoothed out the transfer ports and matched it to the gasket
getting there
smoothed out the boost port even more now it has a real good ramp
then smoothed out the transfer ports and matched it to the gasket
getting there
- Location
- South Africa
I have a very bad Addiction when i can sleep i shop online
bought these to save me after ive had a few run ins with the gunwales
then i wanted better riding shoes my jet pilot are comming apart at the soles
so im following the masses with asics wrestling shoes
found a killer deal on split second 9's for only 30$ as they were missing the insoles no biggie i dont need that anyway besides they retail at 75$ so getting 45$ off for missing 7$ insoles is a bonus
bought these to save me after ive had a few run ins with the gunwales
then i wanted better riding shoes my jet pilot are comming apart at the soles
so im following the masses with asics wrestling shoes
found a killer deal on split second 9's for only 30$ as they were missing the insoles no biggie i dont need that anyway besides they retail at 75$ so getting 45$ off for missing 7$ insoles is a bonus
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- Location
- South Africa
got my riser bars and billet trim lever all i need to do now is have it anodized to match my throttle lever
the bars are alittle wider than my straight bars so going to test first then cut if im not happy
the bars are alittle wider than my straight bars so going to test first then cut if im not happy
- Location
- South Africa
new hull about to be ordered once dep is paid ill let the cat out he bag