Hiram Posted January 28, 2004 Report Share Posted January 28, 2004 After a melt down I had a few weeks ago from running lean after changing my air filter setup, I'm now back up and running along with a few more mods or lets just say I pulled out my Dremel and started grinding somemore from my original porting to the jugs and reed cages work I did myself. First of all I don't want to seem like I'm bragging but I'm happy as can be with these new modifications and this is just some free info I want to share for anyone that's like me and likes to tinker with there own toys to make them fast instead of paying big$$$ to the pro-builders just to get similar results so here it is: #1) I port matched my cases to the joining jugs feeding transfer tunnels, this alone was allot of grinding since they where way smaller than the receiving tunnels and where I believe my major power difference was a result of. #2) Then I raised my cylinder transfer port windows 1mm #3) took the jugs to the machinist to over bore to .020 #4) Installed a set of Vito's +.020 power pistons which I was very tempted to cut there windows bigger but instead left them alone to see what there higher windows would do alone.These pistons are very nice and come with a one piece base gasket that is already matched to the jugs transfer tunnels so this was what I used as a cutout template for the case. #5) Went up 3 main jet sizes and still running a bit lean, so today I will go up 2 more and I should be close. I'm running 16/41 sprockets that before the rebuild I wasn't able to break the rear end loose in 6th gear on loose terrain no matter how hard I got on the throttle, but now 1/2 throttle and it sliding silly everywhere, and on asphalt I can be rolling in 3rd gear and nail the throttle and when the powerband hits it puts the nose in the sky! Quote Link to comment Share on other sites More sharing options...
Blue Duece Posted January 29, 2004 Report Share Posted January 29, 2004 but that doesnt mean you even came close to what a pro builder can do...id venture to say your results arnt similar to a professionals results, not to offend you, but any one of us can grind our juggs and get a little power, after youve ported a few hundred bikes and can see and feel what your "grinding" effects are haveing on the bike, then you can start to make assumptions about porting........again no offense Quote Link to comment Share on other sites More sharing options...
bigwill Posted January 29, 2004 Report Share Posted January 29, 2004 I agree with B.D. You can gain 15 to 20hp with a dremel and some pipes and run with the next guy and beat alot,but If you want your shit to be all it can be,you have to go to man who has paid his dues on learning what works and dont work,unless you are very gifted-your skills wouldnt match what a reputable builder could do,but of course free hp is always welcomed!!!! Quote Link to comment Share on other sites More sharing options...
J..J. Posted January 29, 2004 Report Share Posted January 29, 2004 Don't take this the wrong way, but maybe your bike wasn't running too well before anyway, so a lot of the performance gains could have been just due to better jetting. Anyways, good for you, I certainly don't have the balls the put the dremel to my cylinders. Quote Link to comment Share on other sites More sharing options...
mrmatt Posted January 29, 2004 Report Share Posted January 29, 2004 #1) I port matched my cases to the joining jugs feeding transfer tunnels, this alone was allot of grinding since they where way smaller than the receiving tunnels and where I believe my major power difference was a result of. Thanks for the tip. I never really noticed that these weren't matched from the factory. This sounds as simple as gasket matching the intake and head on an American V8. Which is something that many of us have done before. Quote Link to comment Share on other sites More sharing options...
sredish Posted January 29, 2004 Report Share Posted January 29, 2004 Good job for having the guts to try. Thats the only way to learn. You could very easily pay someone to do it, or you can give it a try and see where you end up. If you got a performance gain out of it, congrats. The next time it will be easier and you can use what you learned this time next. I'm sure a pro shop might be able to egg some more power out, but you saved money and pulled more power, that sounds like a win win. Scott Quote Link to comment Share on other sites More sharing options...
Hiram Posted January 29, 2004 Author Report Share Posted January 29, 2004 MrMatt, this is exactly what I did and was very easy as the vito's one piece base gaskit was exact for me, but if your are opened even more or using some other gaskit just size and old gaskit to the transfers and then use it as the template. You guys are right and I over steped my bounds in my comparision, but for those of you that are like me and are always looking for any thing that could help with each other and enjoy or have the skills to take matters into there own hands or even to share the good info on to whoever you trust to work on you quad this is some garranteed HP, this was not meant to steal anyone's magic thunder. So sorry if I leaked out some of your secret info . BTW I went up two more jets sizes last night to 380's and it ran even better but still need to test if it wants to go bigger. And for a quad to like 380's it's got to be making some nice HP @ sea level 75 degrees Quote Link to comment Share on other sites More sharing options...
NYUK Posted January 29, 2004 Report Share Posted January 29, 2004 somebody had to try it first.everyone can `t afford a 700 port job.backcountry from patriot let us all in on a lil secret a few years back.most of the builders in buisness today at one point or another copied somebody elses portwork to get their start.the innovators are the ones that stand out. Quote Link to comment Share on other sites More sharing options...
MRMOONEY Posted January 29, 2004 Report Share Posted January 29, 2004 yes but who's the inverntor? they had to get it from someone also right? i bet alot of builders have copied others work. Quote Link to comment Share on other sites More sharing options...
Hiram Posted January 29, 2004 Author Report Share Posted January 29, 2004 Well I copied racelogic templates to do the porting but for the case matching I just came up with it as I sat around looking at my jugs and pistons amazed at how a 2stroke works and followed the path of air to see where it could be restricted and said to myself this has got to help some so I opened it up, I expected alittle bit more power but instead got a hole lot more than expected power. Man I took a big chance doing what I did on my new 2004 Shee, I could of ruined the whole power band, but instead the opposite happened so I just shared my geney pig story. Quote Link to comment Share on other sites More sharing options...
Radioactive_Puppychow Posted January 31, 2004 Report Share Posted January 31, 2004 ya know fellas...I did the same thing(self port job) the match porting is very important, also the transfers. lets just say I would and have put my bike up against ALOT of "proffesionally ported"bikes and walked all over them. I think my favorite bikes to race are people with 370 kits....love the look on thier faces when they ask what I have done and who did it. Overall the reaction is disbelief but dont go knockin on a guy about thinking his bike is fast. It may very well be. My bike has stock carbs and jugs. just ported and polished and im kickin out over 70hp on the dyno. So for all you do it yourselfers out there, kee on hoggin them babies out..(heh, it never hurts to know how to tig weld in case you get a little over zealous;) ) Quote Link to comment Share on other sites More sharing options...
Nighty Posted January 31, 2004 Report Share Posted January 31, 2004 Sounds like a great mod! I think ill go with the rage logic porting aswell. buy some wiseco's match the transfers. and up the mains a few... Thanks for sharing! Quote Link to comment Share on other sites More sharing options...
Blue Duece Posted January 31, 2004 Report Share Posted January 31, 2004 I think my favorite bikes to race are people with 370 kits....love the look on thier faces when they ask what I have done and who did it. Overall the reaction is disbelief but dont go knockin on a guy about thinking his bike is fast. It may very well be. My bike has stock carbs and jugs. just ported and polished and im kickin out over 70hp on the dyno. Do you happen to ride in Southern California? im always up for seeing what my 370 will do, i think my 63 horse Trinity MX ported desert Shee would be more of a match............. for the do it yourself port job id trying running a pair of 34"s, if it jumps off the ground you allways have a porting carrier to fall back on, if it gags and chokes on the fuel and air, get your grinder back out, because without the knowledge of haveing done alot of porting it's just hit and miss, which is cool but my trinity port choked on 33's but runs great on stock 26's, my Passion engine wouldnt even start with the stock carbs, let alone pull 85 horse's...but 25 years of experiance is what i was purchaseing , i could have got a template and done it myself..........i think your rolling the dice by doing it yourself, and since you have the skills to break the bike down, a first class port job would really blow your mind and for fairly cheap as well........... Quote Link to comment Share on other sites More sharing options...
Radioactive_Puppychow Posted February 1, 2004 Report Share Posted February 1, 2004 im usually always down in glamis on any given holiday weekend. this years been a little tight with the addition of the baby girl...Id love to hook up w/ any of you guys for some friendly shit talking and a bunch of racing. I usually hang out with superfinishers 2 racing at olds on saturdays...(the drag side of the hill) where all the alcohol bikes are. Lemme know when you go down and we'll try the almost impossible task of finding each other. I did look at a "pro" port job before I started....Im not crazy enough to just start hoggin out metal. anyone who is gonna do it yourself should at least look at how it should be done...you need some kindof idea. I shouldve typed that earlier. I know a sneaky little trick for the transfers too but thats my secret. do research and youll be amazed what you can find and do yourself. Quote Link to comment Share on other sites More sharing options...
Blue Duece Posted February 1, 2004 Report Share Posted February 1, 2004 I did look at a "pro" port job before I started....Im not crazy enough to just start hoggin out metal. anyone who is gonna do it yourself should at least look at how it should be done...you need some kindof idea. I shouldve typed that earlier. yeah thats what i thought guy, i had a sneaking feeling you didnt just start whackin at your jugs and came up with good results, i dont get to glamis much, but live real close to dumont and the national forest is my back yard up here in the high desert and it sounds like you have a sand shee, mine are setup more for open desert and MX, but i too love to just race and shoot the shit with my pals with bikes, win loose or draw, we all have fun, some of my funnest MX races i was the looser........ Quote Link to comment Share on other sites More sharing options...
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