85yota Posted June 1, 2009 Report Share Posted June 1, 2009 well i know i saw somewhere home porting i had a search problem. maybe someone can reply a link but im going to port and polish my own cylinders. i wanted to see pictures and info of some who have done theres. and how to mx drag etc port. my brother had ported his own jugs and he pretty much took everything down with no restrictions and then sanded it smooth up to a fine grit but i rode his bike and i couldnt keep a steady throttle approaching a jump and when i jumped it landed all stupid front up and crooked or nose down. i was airing mine all day perfect without porting. im not sure what i should do little mixed up help would be great thanks Quote Link to comment Share on other sites More sharing options...
tony cub Posted June 1, 2009 Report Share Posted June 1, 2009 porting is one of those things that your going to have a problem getting a straight answer on. a great port job is usally keeped a secreat,or you may have to pay for it... Quote Link to comment Share on other sites More sharing options...
Washburn Posted June 1, 2009 Report Share Posted June 1, 2009 I know a few guys who sell their custom designd die grind created and computer generated port maps. Ask Jim at Passion Racing thats who I would ask first if I wanted to aquire a cirten port map. He has over 150 computer generated port maps for 350 cylinders. I know of a few local guys who got em too. Real strong port maps. Try Macdizzy too. Quote Link to comment Share on other sites More sharing options...
85yota Posted June 2, 2009 Author Report Share Posted June 2, 2009 emailed them both didnt get an answer yet anyone else do there own or got an advice?????? Quote Link to comment Share on other sites More sharing options...
01banch Posted June 2, 2009 Report Share Posted June 2, 2009 My advice is dont do it. If you still want to do it what tools do you plan on using and how aggressive do you plan on going. Realize porting is expensiveish' for a reason because most builders have taken many years to aqquire the skills they have to ensure your motor is going to run well when it is done. Quote Link to comment Share on other sites More sharing options...
85yota Posted June 3, 2009 Author Report Share Posted June 3, 2009 i work as a fabriactor i have access to all sorts of small grinding tools with all grits. ive done heads on my 4x4 trucks.......... but i was just looking at it i dont want to go crazy it seems rough and restrctive. i wanted to take the rough shit off and where it splits into 2 its flat seems restrictive i wanted to bevel it to a point. i dont know just tryin to get some flow goin Quote Link to comment Share on other sites More sharing options...
spurdy Posted June 3, 2009 Report Share Posted June 3, 2009 i work as a fabriactor i have access to all sorts of small grinding tools with all grits. ive done heads on my 4x4 trucks.......... but i was just looking at it i dont want to go crazy it seems rough and restrctive. i wanted to take the rough shit off and where it splits into 2 its flat seems restrictive i wanted to bevel it to a point. i dont know just tryin to get some flow goin I'm by no means an expert but it seems that a simple "clean up" port would be relatively simple to do. However, if you want to pull the true power from the stock banshee porting is where it is at. This is going to require a thorough understanding of the 2 stroke process including flow into and out of the crankcase as well as intake and exhaust durations. The degrees at which these ports are open is the heart of porting. This is completely different then cleaning up the casting flaws from Yamaha. I have complete access to all machining tools as well and would spend the money on a decent port job everyday vs doing it myself! If all your looking for is a clean up, then I say "go for it". If your after power, shell out the bones to a builder and let them bring a smile to your face. JMHO SP Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.