2k7cheeta Posted January 7, 2021 Report Share Posted January 7, 2021 In the process of building my driveline assassin 4mil. The build is driveline +4 crank, assassin cylinders 68mm low port, promod transmission, vf4 reeds, toomy t5s. I’m wondering what I should do for carbs? I messaged driveline to get a starting point for jetting on my pwk28s and they told me they had no luck getting the pwks jetted properly. Told me I was better off with stock. I’m just building it for light trailing and ripping around gravel pits. What carbs would you put on this setup? I have access to a few different sets of carbs. I have stock, genuine pwk28s, 34mm mikuni and 32mm keihin right off hand or I’ll buy another set of there is something that would be perfect. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted January 7, 2021 Report Share Posted January 7, 2021 Pm ayesully810Sent from my SM-A505U using Tapatalk Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted January 7, 2021 Report Share Posted January 7, 2021 In the process of building my driveline assassin 4mil. The build is driveline +4 crank, assassin cylinders 68mm low port, promod transmission, vf4 reeds, toomy t5s. I’m wondering what I should do for carbs? I messaged driveline to get a starting point for jetting on my pwk28s and they told me they had no luck getting the pwks jetted properly. Told me I was better off with stock. I’m just building it for light trailing and ripping around gravel pits. What carbs would you put on this setup? I have access to a few different sets of carbs. I have stock, genuine pwk28s, 34mm mikuni and 32mm keihin right off hand or I’ll buy another set of there is something that would be perfect. Sent from my iPhone using TapatalkWtf no able to jett a pwk?? Is it a joke???I runned pwk 35mm on my driveline cyl, no problem at all.I run pwk 39mm on my 521Almost Everyone are running pwk ffs!!!Envoyé de mon SM-N975W en utilisant Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
WALZ Posted January 7, 2021 Report Share Posted January 7, 2021 I have the same engine and reeds but larger pipes. I too got the answer from them about not being able to tune for 28's. I've been down the road of 35's and know for my riding area I need the fuel economy and I like the lower power. I settled on 33's taking his advice in consideration. There are plenty of folks running 28's, tuned in well and they are happy. I sometimes get buyer remorse and wish I would have stuck with 28's. Opinions are like kittens, everyone giving them away, myself included. Cam at Redline will shake his head if you want any smaller than 35mm. Whats his name who builds CPI pipes and dynos thousands with an AFR swears you'll never be tuned right without Mikunis 🤮. Rock the 28's if you got em! Quote Link to comment Share on other sites More sharing options...
SKEETER Posted January 7, 2021 Report Share Posted January 7, 2021 Interesting, cam has recommended under 35mm carbs on many setups. Quote Link to comment Share on other sites More sharing options...
WALZ Posted January 7, 2021 Report Share Posted January 7, 2021 41 minutes ago, SKEETER said: Interesting, cam has recommended under 35mm carbs on many setups. I am sure he has, not really the point being made. Cam does have my driveline currently and urged 35mm plus to be more precise. He also put 35’s on my last serval. But anyway... Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted January 7, 2021 Report Share Posted January 7, 2021 I'm pondering trying PWK28mm on my 521 this summer. 1 Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted January 7, 2021 Report Share Posted January 7, 2021 33PWK is a safe bet. Should be stupid simple to tune. Quote Link to comment Share on other sites More sharing options...
gusto Posted January 9, 2021 Report Share Posted January 9, 2021 Weird, i was just talking about this. I run 28s on a 421 serval and they are dialed in with the Snipers from Cam himself. He did have trouble with these carbs air screw adjustment. I have switched to Shearers and i cant get the jetting where i want them. I just bought 33 PWK from a guy running Driveline set up who couldnt get his 28s working either. This guy eneded up going 35s. Driveline seem to perfer 35s on their 421s, thats how id go. 2 Quote Link to comment Share on other sites More sharing options...
SandSlingerOR Posted January 9, 2021 Report Share Posted January 9, 2021 (edited) Good info. I ran 28s on oem cylinders and cam dialed them in for me and they worked fantastic. If I ever step up to a driveline I'll Remeber they like 35s now. Edited January 9, 2021 by SandSlingerOR 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.