Jstrong Posted May 8 Report Posted May 8 Hey guys, after some consideration and listening to you guys replies from my last topic, I have decided not to go with the 443 or 465. I’ve realized that it’s too much for the trails. I was really chasing horsepower. And also, it’s a couple thousand more than what I wanna spend at the moment lol. So here’s the idea (I have some stock cylinders sitting around in my garage).so I want to go stock cylinders with 66 bore, 4mil, 397 and get a MX hard-core port on it. I talked too herrjugs. And he’s saying he could do the port job and custom cut domes to accommodate 58 stroke. And prevent putting a space plate. On the other hand in thinking about a 392 Athena which is a stock crank but 68 bore triple port. Which I would also have herrjugs do a hard-core MX port. But I would have to buy the Athena cylinders. Which I have no problem with, but I’m trying to ask you guys if you think it’s worth it just for the added triple port and nikasil. I just want something I can bs around on. With having a good amount of power, bottem- top end. I already have a 421 serval. So I’m trying to do something different this time around. If you guys have any experience with the Athena cylinders,let me know what you think? And are they worth it and how do they compare to stock (overbored)cylinders? Quote
locogato11283 Posted May 8 Report Posted May 8 Just stick with the stock cylinder. If you already have a 421 Serval, there's no reason to bother with the 392 Athena. I just don't understand why you'd want less power than the Serval. Quote
Jstrong Posted May 8 Author Report Posted May 8 1 hour ago, locogato11283 said: Just stick with the stock cylinder. If you already have a 421 Serval, there's no reason to bother with the 392 Athena. I just don't understand why you'd want less power than the Serval. This is the second build. Something just to bs around on. Got the banshee for only 1500$ wasn’t expecting to buy it, but it was a deal I couldn’t turn down. It’s not that I want less power. It’s less money to build lol. Since I already have 25K in the serval. Stock cylinders is just not enough power. Unless I bore it and port. The reason why I’m comparing the two and asking is because I’m looking for the most bottom end power. And reliability. Quote
SKEETER Posted May 9 Report Posted May 9 My worthless opinion, just get some cyls from Bill @Driveline Performance and he can set you up with rest. Quote
Jstrong Posted May 10 Author Report Posted May 10 7 hours ago, SKEETER said: My worthless opinion, just get some cyls from Bill @Driveline Performance and he can set you up with rest. Yep. I’m really overthinking it bro lol Quote
gusto Posted May 10 Report Posted May 10 You’re not thinking right. You want to take stock cylinders and bore them to 66 leaving you one more bore (in reality) or possibly no more bores, then pay for porting, then domes and pistons. Why? buy Driveline kit direct from DL and keep your crank (stock Yamaha cranks are awesome or buy a used one) and build a 392. go to the product review section of this forum and find a post by Mailman on his 392. its a no brainer Quote
Jstrong Posted May 12 Author Report Posted May 12 On 5/10/2026 at 6:16 PM, gusto said: You’re not thinking right. You want to take stock cylinders and bore them to 66 leaving you one more bore (in reality) or possibly no more bores, then pay for porting, then domes and pistons. Why? buy Driveline kit direct from DL and keep your crank (stock Yamaha cranks are awesome or buy a used one) and build a 392. go to the product review section of this forum and find a post by Mailman on his 392. its a no brainer Yeah I’m leaning toward that direction also. I have a stock crank in really bad condition. Do you know of anyone that could rebuild cranks? Quote
Jstrong Posted May 12 Author Report Posted May 12 On 5/10/2026 at 6:16 PM, gusto said: You’re not thinking right. You want to take stock cylinders and bore them to 66 leaving you one more bore (in reality) or possibly no more bores, then pay for porting, then domes and pistons. Why? buy Driveline kit direct from DL and keep your crank (stock Yamaha cranks are awesome or buy a used one) and build a 392. go to the product review section of this forum and find a post by Mailman on his 392. its a no brainer The thing is the kit that herrjugs Offers includes a new welded crank, Cylinder porting, pistons and domes For 1300 a little bit more than what I would be spending on Drivelines kit just for the cylinder and pistons. That’s why I’m considering that route. But if I could get my crank rebuilt that would be an option also Quote
gusto Posted May 14 Report Posted May 14 DL cylinders are plated by Millenium. That right there is the difference. Also no Chinese cranks or cylinders. DL can rebuild your stock crank. It will just need bearings and be trued. I’d call DL and send your engine there. If your set on HJR get the mx hardcore port, it will be less peaky. Quote
Jstrong Posted May 15 Author Report Posted May 15 On 5/14/2026 at 12:39 PM, gusto said: DL cylinders are plated by Millenium. That right there is the difference. Also no Chinese cranks or cylinders. DL can rebuild your stock crank. It will just need bearings and be trued. I’d call DL and send your engine there. If your set on HJR get the mx hardcore port, it will be less peaky. ok thanks Quote
SKEETER Posted May 16 Report Posted May 16 Driveline does cranks . Bill could hook ya up with everything. 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.