350X with 300EX engine... Ultimate trail bike??

[Derrick Adams]

3Leggeddog and I were into one of our conversations the other day. We saw one of these at Wellsville a couple weeks ago, and I was thinking "What a perfect trail bike".

I mean this trike has the agility and plush suspension of the 350X. Still capable of aggressive sport riding, AND reverse and electric start!!

I don't think it could get any better than that could it?

Who else has built or thought of building one of these?

[OldSchoolin86]

My project started out with using that engine then I just decieded to use what I had. It's a great idea if you're willing to do a little engine work. In stock form the 300ex motor is a bit doggy but a proper 330 kit would easily keep up with your average 350x's. You'd have the power, electric start and reverse, sounds good to me.

[350Xhilaration]

Speedbump pulled an engine from his 350X and put it in the 300EX chassis, he went as far as dropping the EX engine in the frame of the X, but that was as far as it got. We thought the same thing 3 years ago. Since he took the engine out of the X, at least he could make it ridable. Needless to say, he parted the trike or sold it as a roller to a buddy, I can't remember.

Make it happen Derrick. :p

[brapp]

whyyyyyyyyyyyyyyyyyy????????????? does he still have the motor?

[Howdy]

I have been looking for a cheaper 300ex motor for just this kind of swap. I had never thought about it until TimSr mentioned it ( probably over 4 years ago ). Some day I will have me a cool 300x in the stable. I already have a chassis waiting. ;)
Howdy

[350Xhilaration]

The engine was sold with the quad. the roller X went down the road too.

Speedbump doesnt keep many things very long. (although the 350EX was one of the longest keepers beside the wife and kids)

[Blown 331]

Or how about using a 05-06 400EX motor. They have reverse now.

[OldSchoolin86]

Or how about using a 05-06 400EX motor. They have reverse now.
LOL, believe me, they don't fit in anything but thier own frame.

[350xBomb]

Am I the only one that thinks this is kinda stupid? Why would you take a perfect trike and put a smaller engine in it? Seems bass akwards to me. I like the idea of the 350 in an EX, but then its not a 3 wheeler. So you might as well just go buy a new quad? Maybe it's just me.

[Howdy]

Am I the only one that thinks this is kinda stupid? Why would you take a perfect trike and put a smaller engine in it? Seems bass akwards to me. I like the idea of the 350 in an EX, but then its not a 3 wheeler. So you might as well just go buy a new quad? Maybe it's just me.

I understand the part about a smaller motor. But with a few performance mod's you can get the power back. The main reason I want to do this is because of having reverse and electric start. I like the ride of a 350x but having to kick start it every time I ride hurts my legs. This is why I ride the Polaris scrambler more than my 350x these days. I'm not lazy, I'm getting older. The older I get the harder it is on this body to start a 350x.

FYI, don't worry, I have a few 350x's, and I will always have a couple with stock motors in them.
Howdy

[Troll 2]

:crazy: ................................... :beer

[TimSr]

I have been looking for a cheaper 300ex motor for just this kind of swap. I had never thought about it until TimSr mentioned it ( probably over 4 years ago ). Some day I will have me a cool 300x in the stable. I already have a chassis waiting. ;)
Howdy


This is the same trike I had mentioned ages ago.


I cant see replacing the motor on a good running 350X, but if the motor is toast, 300EX motors are a lot easier to find.

[hrc200x]

Its surprising more of these havn't showed up for sale in the last 5-10 years considering how many 350x's were probably bought cheap for their motor and put into a 250x or 300ex to race. You'd have thought the racers would have put the 300ex motor back into the 350x and sold it and got their money back plus some.

[OldSchoolin86]

The problem is you can find 350x motors cheaper then 300ex motors or you probably would see this more.

[TimSr]

Its surprising more of these havn't showed up for sale in the last 5-10 years considering how many 350x's were probably bought cheap for their motor and put into a 250x or 300ex to race. You'd have thought the racers would have put the 300ex motor back into the 350x and sold it and got their money back plus some.

The 250X and 300EX were poor chassis/suspension designs to race with, and teh 350X motor put them into classes where they could not be competitive which is why this was never popular. A number of 350X motors were fitted into TRX250R frames for this purpose, but once the 400EX was born, this setup was instantly obsolete. 400EX idea was based on the "TRX350X".

[Mosh]

i built that motor that derrick saw at wellsville. it is 60 over with a cam and springs and a port and polish job. i did the port work. we put a stock 350x sprocket on the front and he had a plus 6 swinger done. it runs a cobra 250x pipe on it,350x carb and a reverse lever mod to make it easier to get reverse. oh it also has new timing chain 12:1 piston and dirt digger clucth. he likes it better than his 85 atc 250r. says it pulls hills awesome. the only downfall, with that piston in it he has already burnt a starter. but any way just thought you might like to know the history behind that trike. also it was stolen from his garage 3 years ago and the lucky sob found it and got it back. cool

[3leggeddog]

The 250X and 300EX were poor chassis/suspension designs to race with, and teh 350X motor put them into classes where they could not be competitive which is why this was never popular. A number of 350X motors were fitted into TRX250R frames for this purpose, but once the 400EX was born, this setup was instantly obsolete. 400EX idea was based on the "TRX350X".


yeah doug shepard did that aorund here,called it a trx350xr.mean bike,built them up with the 452 kit,and raced them in the 2 stroke class.who knew that years down the line 4 strokes would take over.

[Wickedfinger]

I just don't see the point in giving up 11 Hp. - reverse and electric start be damned!. However - I see the practicality in Tim's "easier to find" statement.

[hotroddal]

a friend of mine put a 1991 250x engine in a 350x frame, it bolted right in, the only thing he had to do is just cut and re-weld the exhaust pipe to clear the frame, he put the 350x engine into the 250x quad, he did this conversion becuase he had hurt himself prity bad on the original 350x and the wife said it has to go or you do sumthing to de-tune it so he swapped engines.

[OldSchoolin86]

i built that motor that derrick saw at wellsville. it is 60 over with a cam and springs and a port and polish job. i did the port work. we put a stock 350x sprocket on the front and he had a plus 6 swinger done. it runs a cobra 250x pipe on it,350x carb
Why the smaller 350x carb?


I just don't see the point in giving up 11 Hp. - reverse and electric start be damned!. However - I see the practicality in Tim's "easier to find" statement.
Actually it's about 4-5hp differnce and with some proper work 300ex motors can pull more hp then a stock 350x. A well built 330ex motor will pull a lot more then that too.

[Mosh]

he had the 350x carb on it when he bought it. he got the thing for like 800 bucks.it ran good stock for about 4 years.then she went south,and that is what we did to it. i will tell you though, i will line that up with a piped 400ex any day, it feels real crisp.hits kinda like a 2stroke with the port work. he had a 350 x and he likes it just as much, if not more.you will no him if ya see him (3hweelins a good feelin) a.k.a tripod troy.later guys

[Wickedfinger]

Why the smaller 350x carb?


Actually it's about 4-5hp differnce and with some proper work 300ex motors can pull more hp then a stock 350x. A well built 330ex motor will pull a lot more then that too.
I don't know about that - From the respective manuals, Hondas stated Hp of a 300EX is 17 - 350X is 28.

[350xBomb]

I don't know about that - From the respective manuals, Hondas stated Hp of a 300EX is 17 - 350X is 28.


I agree. The 350 is an extremely robust motor. You dont see people taken the 300s and putin them in a 250x fourwheeler. Hell most of the people who buy trashered 350xs just want the motor cuase you can bore the hell out of it and it stays relatively reliable. Far for reliable than the 300. But thats my opinion.

[350Xhilaration]

Nice Pic Troll...too bad that one never made it past the posing stage. :( It almost made it.

[OldSchoolin86]

I don't know about that - From the respective manuals, Hondas stated Hp of a 300EX is 17 - 350X is 28.
Sorry but I have zero faith in manuals. The 17hp for the 300ex sounds right for at the rear but the 28hp on the 350x is defo from the crank. Apples and oranges IMO.

[thefox]

Seeing as most of the 350x engine out there have 20 years of use on them maybe we should use the results FYI got instead of the manual, 21ish HP for the 350x?