350x - 300ex motor

[OldSchoolin86]

MR ATC:
LOL! Your all right buddy. Can't wait to see you at the next Haspin gathering. I'll have the quad there so you can redeam the good name of the 350X. I'll have to work on my holeshoting skills because you are damn good at it. For anyone that wasn't there I let MR ATC race the 400EX down the strip several times because he was beating things with my 400EX you don't normaly hear about including machines like the Banshee and the Raptor. It was pretty sweet.

Trikeaholic:
You have a very good point with the 17 year old motor but you know how it is, I have to enjoy the victory. I had a lot of fun out there. I couldn't remember who had the other one I'm glad you did. I'm sure that a fresh and slightly modded 350X would have no problem sneaking up front but between MR. ATC and myself we proved the the 400EX's aren't the big slow dogs they are rumored to be. Hope your planning on being there next year too.

Peace guys and be safe out there.

[Trikeaholic]

I too got to ride that golf cart,(OS 400EX) along with trikes suzuki. I liked the Honda better, and yes, it was fast, lots of low end, and fun to ride, but dont count on me buying a cart anytime soon!

[karnivore660r]

:shock: I'm just wondering who the suck azz riders where that you beat them on banshee's and raptor's with your ex?

I raced my stock raptor against your piped and jetted (cam'd? & ??) 400ex and we where dead even the whole way.

BTW, a 330ex motor in a 350x frame would stay with or beat a stock 350x.

[OldSchoolin86]

You missed all the good racing. Those victories were won by MR ATC earlier in the day.

Back to the 330ex/350x debate. I wrote Mickey Dunlap to see what he would say. Now you guys got me wanting to make one of these machines. Here's what I wrote:

I have a 350X minus the motor and want to install a 300EX motor. I can do all that but I want to know if I got the motor if we could put together a 330kit that would be stroger(faster) than the stock 350X motor. I installed one of your 80mm piston/sleeve kits in my old 250X and like your products. What do you think we can do here?

Thanks
Frank

Here's what the king of power wrote himself:

Frank,

If you put the 330 kit in, cam & valve springs, port & flow work it will
outrun your 350X.

Mickey Dunlap

Are you going to tell me that Mickey Dunlap is wrong too?

[TimSr]

Getting back to the original post, a friend of mine has a 300EX motor in his 350X, and he said it was pretty easy. I didnt even notice until the first time he used reverse, then it hit me that he had electric start too, and I asked all, the questions.

[MR ATC]

I'm not gonna say anybody i haven't spoken to personaly on this subject that there wrong or right but, what i will repeat is the shop i worked at used a micky dunlop kit to build the 330ex i mentioned earlier that got beat by the 350x i built with nothing more then a 10.25:1 piston.
(yes the head was also ported ). tell me this how do you think he could get 10 more hp with just a big bore,cam springs,port and flow when he can't do it to a 350X without a stroker kit? not to mention the 300ex's rev limiter. did you ever think he was refuring to a 17yr old worn out 350X motor compared to a freshly rebuilt 330EX one when he made that statement?

[OldSchoolin86]

I've seen the heads on the 300ex/250x's, yes I can believe that you can get 10HP out of a big bore, cam, and porting job. That would put it 2HP over the stock 350X.

So your saying that this 350X with 10.25:1 piston had stock bore, exhaust, air cleaner and jetting? This is a comparision to a stock 350X motor you know.

[Billy Golightly]

The key here is that Bill's 350X head is ported. Porting is without a doubt the single most hp effective mod there is. I don't care if your piston is 10ft in diameter. If the fuel, and the exhaust is incoming/exiting through a hole the size of a dime, The engine is not getting the fuel/exhaust flow near what it needs. Anything over what the engine NEEDS is extra, meaning therefore more power. The stock exhaust on the 350X is one of the most restrictive things I've ever seen on any offroad machine in my life (Tied with a stock Tri-Z exhaust).

I'm not sure if the 300 head is "optimized" for the extra 30cc it put on plus its extra carbeuration/exhaust in the cam that comes with the 330 kit. But if its not, the engine is being restricted from what it NEEDS, and any EXTRA that it could have.

[OldSchoolin86]

The 330 kit would include a good porting job. The stock ports on the 300ex are restricted so bad I can't even get the tip of my pinky finger in them. I thought he ment the 330ex was ported but if he meant the 350X then that machine has no buisness in this debate.

[MR ATC]

First let me clarify something it was not my 350X it was a customers. now let me also clear some things up it had a 10.25:1 piston only. the exhaust,carb,and porting were stock. the carb was rejetted and a uni air filter were installed. the 330ex had a all around cam,valve springs,330 piston,bigger carb (not sure what size) uni air filter,and was ported to Micky's specs. after they were done we raced and the 350X won with no problem. (and rider skill is irelevent since he (the other machanic) was/is a better rider then me

[OldSchoolin86]

Thank for restating that the 350X your talking about has nothing to do with this.

ok you lost me O.S. what do you mean it has nothing to do with it? your stating opinion and speculation i'm stating facts of a actuall real life comparison. do you really think a 10.25iston makes that big a differance in this debate? especially since it had a stock pipe and carb. i think you've been riding these golf carts too long there messin up your head...lol

[OldSchoolin86]

lol, no I don't think it's a huge increase but this 330ex motor is probably only a couple hp more. Bumped compression, a nice air cleaner and a good jetting should put the 350X motor back up there. Heck a good air cleaner and jetting alone would get you a couple more hp on that motor.

[86waterpumper]

good points, I've studied on putting a 250x or 300ex motor in my 200x once it wears out again, for the reasons billy already stated, it would rock in the woods, my 200x motor is sufficient for now, but I have to run a 11 tooth for it to pull hard since I'm a pretty big guy, and I wouldn't mind more top end and reverse electric start etc. But I've talked with several people about the goki starters made for the 350x, and they all said that once you put a high compression piston in it, the starters will burn out. Now I don't know whether this 330 kit for the 300 motor has higher compression than stock, but if it did would this not burn up the stock starter just as easily as it would a goki starter? One reason I wonder is because my friend has a 98 300ex, and keeps his with a fresh battery and on a trickle charger, and when it gets really cold, (for down south anyway) his starter will barely turn his motor over, usually not enough to crank it. Did goki make a starter for the 200x? Curious since it had such higher compression than the 350x in stock form.

[350Xrider]

We'll Mickey Dunlap is going to tell you that a 330 will outrun the 350, he wants to make money he wants to sell you the kit, he isn't in the business to lose his ass. I'm sure he wants all the money he can get.