trueraiderfan Posted January 23, 2007 Report Posted January 23, 2007 My builder says that he just open's the window's up a lil bit he does not hog them out or anything do you guy's think that is ok? I dont wanna weaken my pistons up and make it not reliable at all. Quote
bigboybanshee Posted January 23, 2007 Report Posted January 23, 2007 I personally wouldn't have it done...Just think...for every rebuild you'd have to have the new pistons cut to match the porting. I think the gains are minimal too. It just seems like more hassle than its worth Quote
dajogejr Posted January 23, 2007 Report Posted January 23, 2007 Don't do it. Weakens the piston in my opinion...and I've seen a few break apart, which I believe lightening the pistons was the fault.... The gain you may or may not see would be so minimal, if anything, I don't think weakening the structure is worth it. Quote
trueraiderfan Posted January 23, 2007 Author Report Posted January 23, 2007 Thats cool man but what do I say to him umm just dont do it? err what. the reason I am asking is beacause i hate when people act like they know more about cars and financing that I do And I have done it now for 7 years and I just dont want him to feel like I think I know everything cause I am far far from that. Quote
dajogejr Posted January 23, 2007 Report Posted January 23, 2007 You shouldn't have to give him a reason, it's YOUR bike. Just tell him not to do it, and that's that.... Now...if he wants to pay for the rebuild...then, hey...it's up to you!!! I'm sure with all the drag racers and high end engine builders out there, if this really netted gains over reliability, they'd be doing it too... Quote
odaen Posted January 23, 2007 Report Posted January 23, 2007 Thats cool man but what do I say to him umm just dont do it? err what. the reason I am asking is beacause i hate when people act like they know more about cars and financing that I do And I have done it now for 7 years and I just dont want him to feel like I think I know everything cause I am far far from that. I don't know personally. But I know that at some point, you gotta realize that your builder must be experienced enough to be able to give you good advice about your motor. If you don't trust what your builder is telling you, then it might be a good point to look elsewhere. The last thing a builder wants is for an unhappy customer to come back 3 weeks later wanting their money back, so he must feel pretty confident that it's an OK thing to do. Quote
samdust Posted January 23, 2007 Report Posted January 23, 2007 Thats cool man but what do I say to him umm just dont do it? err what. the reason I am asking is beacause i hate when people act like they know more about cars and financing that I do And I have done it now for 7 years and I just dont want him to feel like I think I know everything cause I am far far from that. just tell him u dont want it done. easy as that. its ur bike thats like a hair stylist saying hey im gonna give u a fro ull look good. just say no. Quote
trueraiderfan Posted January 23, 2007 Author Report Posted January 23, 2007 Cool guys thanks for all the advice I appericate it. I dunno what the heel I would have done if it werent for the hq on my bike! Id probably still be thiumbing my bag woundering what the hell I wanted to do to it still. Quote
wesw Posted January 24, 2007 Report Posted January 24, 2007 your from ark city right. who you getting to do your bike. that guy in winfield or mulvane or someone else?? bigred can tell you about porting pistons. it will basically weaken it and make it easier to blow up. Quote
Snopczynski Posted January 24, 2007 Report Posted January 24, 2007 Wiseco usually cnc's the pro lite pistons to about the most material you can safely take off the skirt and pin boss area. Quote
Washburn Posted January 24, 2007 Report Posted January 24, 2007 Builders just give you ideas and you either go with them or you dont. People change their mind all of the time its your bike just tell him you thought about it and you would rather not port the pistons. He will say OK. You dont have to go into why you dont want to and if you do enlighten him with your thoughts and see what he has to say. If he says he would still do it say not on mine and call him a bitch or something haha J/K you get the point though Quote
trueraiderfan Posted January 24, 2007 Author Report Posted January 24, 2007 (edited) your from ark city right. who you getting to do your bike. that guy in winfield or mulvane or someone else??bigred can tell you about porting pistons. it will basically weaken it and make it easier to blow up. Ya bro his name is Mike Steiner He is a hell of an engine builder he is also the guy that invented the heatseeker temp guage to put on your bikes. He has answerd alot of my questions and is super nice and he is ver cheap. Check this out this is what he is doing for 350 bucks 1. Taking the port job from a mx to as far as you can go with out being a full blown drag port and matching it to my CPI SB inframes 2. Installing my crankseal bearing. 3. Putting the engine all back together and back into the bike. 4 installing the new 34mm Pj's and plug chopping until it is perfect 5. installing the new clutch assembly,new shift star mod,new pingle fuel valve,new vf3's, new clutch cable, new throtle cable, (all from FAST) he is putting the whole bike back together and tuining it and anything else that needs done to it for 350.00 porting and all You just cant find anybody that does work that cheap He really does this as his side job (But he has been doing it for 20 years) He also owns a Body shop wich takes up most of his day, but I brought the bike to him monday and he will have it done friday or saturday so It not like its a long turnaround either. He is trying to get me to buy a 500 Zilla but I told him that Im buying a drag shee next and it will only be used for the track and the dunes then I might buy a zilla. But I gotta get this shee done first I want it to whip some ass on the dunes and on the local tracks (all pokes) and really get a good suspension set up to make it a good jumping quad as well. HA sorry for the long thread but Im bored right now and its passing the time till friday! All I have been doing this whole weekl is watching Huevos videos and your Guys' Videos haha cause my shee has been down since the end of July it has taken me this long to save up the 1800 dollars that I have spent on it on everything (tires included full dune set and full knobbies) cause the wife still wanted a few rooms in the house remolded as well so gotta keep her happy. Edited January 24, 2007 by trueraiderfan Quote
wesw Posted January 24, 2007 Report Posted January 24, 2007 sisters husband got him to port a set of jugs. they run pretty good for a 350. best of luck. 350 is pretty cheap for all that. and dont let him port the pistons. whatever you do Quote
BigRed350x Posted January 24, 2007 Report Posted January 24, 2007 Yes, I can tell you from experience... porting your pistons will just let them fail earlier. I had a piston break the skirt off and bugger up a top end. Jacked a set of VForce 3 reeds as well thanks to all the crap banging around inside the cylinder. Had to buy a new top end, gaskets, o-rings for the head, and new reeds for that one side, thanks to a broken skirt. lol Don't port them. For the 1 or 2 hp you MIGHT gain, its not worth the added risk of a broken skirt down the road. - Jared Quote
jayzx10r Posted January 27, 2007 Report Posted January 27, 2007 (edited) My builder says that he just open's the window's up a lil bit he does not hog them out or anything do you guy's think that is ok? I dont wanna weaken my pistons up and make it not reliable at all. I can't disagree with anyone elses conclusions and I don't mean to step on anyone's toes, but I personally did this to my 2 RD 350s, my 3 RD 400s, and 2 RZ 350s with no negative impact. I figure that flow is flow. My contention is that if your cylinder is ported, why isn't your piston? A 1/4" can go a long way... Like anything else, if you go too far, you can count on serious engine damage.... I believe that Wiseco offers pistons already ported...their HP series...842s. That is what is so great about these RZ/'Shee motors... They are chain saw buzz boxes. Usually, a well thought out concept works out with good results. This may be one of those opportunities to make some power. Just don't change the timing and be REASONABLE in the amount of material you remove :sweat: if you do!! I'm going to do it next time I change pistons, heck, I thought everyone did it!! Of course, I'm always open to learning something from someone else so if I've been blowing it all this time, It's never too late to change!! Top pic are stockers. Bottom photo is the 842s. Notice the width difference? Not a lot, but a bit.... Have a good one, Jay from SanD. Edited January 27, 2007 by jayzx750 Quote
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.