Z400Banshee Posted November 26, 2012 Report Share Posted November 26, 2012 I'm building a 421 and would like to run dual PWK 35's but I'm wouldering if my pipes will fit with them. I have fmf fattys. Second do i have to get a lock up clutch you around 80hp? I really dont want to but i also dont want it to slip Quote Link to comment Share on other sites More sharing options...
Finch Posted November 26, 2012 Report Share Posted November 26, 2012 ported? you could get away with prolly 3hd springs or maybe all 6 my 392 cub did just fine with 3 hds no slippage i would get some different pipes for sure your only hurt performance with those on a cub imo Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted November 26, 2012 Author Report Share Posted November 26, 2012 thanks for the reply and yes its going to be ported. im looking for mid to top but i want to make sure they will fit past my carbs. Im thinking maybe for toomey t5's if they fit? When I bought the bike it came with the fatty pipes but it was bassically a stock motor Quote Link to comment Share on other sites More sharing options...
Finch Posted November 26, 2012 Report Share Posted November 26, 2012 id go with shearers or cpis for the cuby i had t5s and just seemed like they were choked down. and you should be alright with yout carbs brandon at wildcard sells a sweet intake i just picked one up that puts your carbs at a angle to miss pipes works good with shearers Quote Link to comment Share on other sites More sharing options...
vulvafan537240 Posted November 28, 2012 Report Share Posted November 28, 2012 35's will fit but like finch said, shearers or cpi's will work better with a cub. Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted November 29, 2012 Author Report Share Posted November 29, 2012 thanks for the help. im having it ported at a local shop that builds race quads. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted November 29, 2012 Report Share Posted November 29, 2012 thanks for the help. im having it ported at a local shop that builds race quads. Please do tell there name. We are always looking for a good shop. Quote Link to comment Share on other sites More sharing options...
majorcr3 Posted November 30, 2012 Report Share Posted November 30, 2012 Like said above...shearers are definitely the way to go(thats whats on my 421 with 35pwks also) Cpis are also great pipes, though i havent ran them on my 421. Both are topend pipes. As for the lock up, if you dont want to go all out direct drive(spendy investment) go with a slingshot lock up. It will fit right under your stock case and there is a guy selling one on the bhq facebook page for like 125 bucks. Hopefully your shop knows what they are doing with the porting. There is a local yamaha shop around me that claims to do great porting, but if you dont know what your looking for they will just do a clean up port and charge you for a full on drag port. Check into some site sponsors on here, they have great reps and have fast turnaround time with excellent prices. I have personally delt with cameron at redline, and kevin at HJR. Both are great guys. If you live in oregon redline also has a dyno the he can dial your bike in on with jetting and gearing so it is perfect for you. Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted December 3, 2012 Author Report Share Posted December 3, 2012 What are some good brand name clutches for a 421? Are Barnetts any good? Quote Link to comment Share on other sites More sharing options...
bluebanshee98 Posted December 3, 2012 Report Share Posted December 3, 2012 i would not give that shop the cylinders to port....... im not saying they dont do good work but you can be assured to get a excellent port job from one of the site sponsors and you will know exactly what your getting. shearers or cpis will be the pipe you want for your cub. im guessing your going to be running pods for filters. if not then the shearers will not fit with the stock air box unless they are custom made. cpis will work fine with the air box. imo if your gonna have a cub motor you should run pods, drag port it and use shearer pipes for starters Quote Link to comment Share on other sites More sharing options...
camatv Posted December 4, 2012 Report Share Posted December 4, 2012 you dont have to have it "drag ported" ic cna be ported to suite your style of riding also. the carbs should fit just fine. might bang into the pipes on the carb tops but that mostly depends on the intakes you use. a lockup is not totally necessary. check out the HD clutch kit from driveline performance. it has stiffer springs and if its too stiff then work out your clutch grabbin arm.... using any stock springs at all will result in mostlikely a slippy and burnt up clutch.. make sure you get a good billet clutch basket and if necessary replace the clutch boss and preessure plate to have nice new surfaces for your better clutch to work with. Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted December 6, 2012 Author Report Share Posted December 6, 2012 thanks ill give driveline a try Quote Link to comment Share on other sites More sharing options...
dajogejr Posted December 6, 2012 Report Share Posted December 6, 2012 I have to be honest, it's a good idea to get the trans cut (not full on override, but at least dog removed) to get it to shift. Once you start making that kind of HP... in my experience, you may find stiff ass springs to hold the power, but it normally will shift like shit. If you're gonna have it apart that far, address the trans now. Quote Link to comment Share on other sites More sharing options...
camatv Posted December 6, 2012 Report Share Posted December 6, 2012 the trans i do shifts fine with a full driveline HD clutch and a 9 plate nmotion basket in the ole wife's 350cc alky bike... its around 90hp no problem.. i have seen a LOT of other modified transmission's shift like do do... Quote Link to comment Share on other sites More sharing options...
Z400Banshee Posted December 7, 2012 Author Report Share Posted December 7, 2012 I'm thinking I might be right around 80-85HP but I have the whole motor apart right now so you got me thinking about getting the trans cut. I probably will because I dont want to fight it shifting and Im not going to want to pull the motor back out to redo the trans lol. My next question, what does the hinson spring tension basket exactly do compared to a regular hinson basket and can you use different primary gears on the spring tension basket? Quote Link to comment Share on other sites More sharing options...
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