Gemeiner Posted October 18, 2016 Report Share Posted October 18, 2016 What exactly is the difference between big bore cylinders and putting a big bore sleeve in? I have no idea. I read that there can be breathing problems with the sleeved. I need new cylinders before i get them ported so im either going to get stock or big bore since i found a used set for 350. Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 Nevermind. I got it. If you sleeve a ported cylinder it messes with the porting. But big bore cylinders come pre-sleeved. Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 18, 2016 Report Share Posted October 18, 2016 Not exactley. You can sleev and port or even buy a sleeve with a relatively different port layout all together. The problem with putting a big bore sleeves in stoccylinders is that they choke off the already small transfer ports. Then you are trying to fill a bigger bore with less air/fuel mixture flow. A "big bore" or aftermarket cylinder is typically the better option. There are quite a few different cylinders available now with a few companies offering different port layouts that accommodate different riding from Trails, Dunes , or Drag Racing. They typically have far better port layouts and larger transfers or even more then stock amount of ports. This allows far more ability for a cylinder to pump more air and fuel mixture which in turn makes more power. We are to an age where a lower port time cylinder can create almost the same kind of horse power as a high strung drag motor, but just a bit sooner in the RPM's. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 Oh ok that makes sense. So theyre just casting the cylinders with the port already? Do they require a cleanup or anything and how would they compare to a port from builder? Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 Not to double post but how do servals compare to big bore? Why would they make so much difference Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 So im building a mostly trail bike and this will be my first 4mil but i also ride wide open. Im looking for more bottom end but just more useable power over all. Would normal big bore cylinders or serval cylinders be better for me? Not sure what determimes the power curve Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 The cylinders i found arent monoblock but theyre pretty new and only 350 bucks Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 http://m.ebay.com/itm/Yamaha-Banshee-cylinders-pistons-jugs-head-66-00mm-big-bore-UNPORTED-/291881012795?txnId=1362228627019 Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 Ill cancel it then hahaha. Kinda jumped the gun earlier Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 18, 2016 Author Report Share Posted October 18, 2016 Huh. I thought big bore was basically stockers that come pre sleeved for strength to hold a bigger bore. My stock cylinders are bored to 65 already from the last guy. I dont wanna put money in em if theyre basically toast. Ill have to reach deep and just get the servals. Thats what i really wanted anyway. Wouldnt want to have to report when i can finally afford them. Guess this is why i have my credit card. Thanks again dude. Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted October 18, 2016 Report Share Posted October 18, 2016 For a fella like you wanting to save a few bucks, call Driveline. They have a couple options. Or if you have the dough, a serval is a pretty killer motor. 2 Quote Link to comment Share on other sites More sharing options...
Power_Man Posted October 19, 2016 Report Share Posted October 19, 2016 Huh. I thought big bore was basically stockers that come pre sleeved for strength to hold a bigger bore. My stock cylinders are bored to 65 already from the last guy. I dont wanna put money in em if theyre basically toast. Ill have to reach deep and just get the servals. Thats what i really wanted anyway. Wouldnt want to have to report when i can finally afford them. Guess this is why i have my credit card. Thanks again dude. Sent from my SM-N920V using Tapatalk You may already know this, but buying just the cylinders is a fraction of what you will have to buy. You will need a lot more to make it a working engine, then there is a lot of other supporting mods that should(need to) be done. Give one of the sponsors here a call, and let em know your situation. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 19, 2016 Author Report Share Posted October 19, 2016 Ya ive been talking to Jeff and Cody at FAST. Pretty much replacing my entire bottom end except my stator and transmission. For now that is. Ill probably be closer to 3 grand when im done since my motor was completely stock. I just hate seeing 4g on my credit card lol feels like slave labor at work. But i couldnt go without my bike for a few months so ill just eat the cost. Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 19, 2016 Author Report Share Posted October 19, 2016 By done i mean the basics. Sent from my SM-N920V using Tapatalk Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted October 19, 2016 Report Share Posted October 19, 2016 Do a pro mod trans while your in there 1 Quote Link to comment Share on other sites More sharing options...
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