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<blockquote data-quote="eyexer" data-source="post: 70926" data-attributes="member: 315">Lot of good advice on here.&nbsp; I've been involved with MX since 1980.&nbsp; There are pro's and con's to any bike you choose.&nbsp; two strokes are great but they are tough to ride for beginners unless you do some things to them to make them more ride able.&nbsp; Four strokes are easier to ride but require far more maintenance and far more cost to keep up or repair.&nbsp; All bikes hold their value fairly well now compared to years ago.&nbsp; So starting a kid out on a 65 two stroke for a year then to an 85 then a 125 isn't as big a financial hit as it used to be.&nbsp; Four strokes are more expensive initially but you get more for them at resale.&nbsp; However, with four strokes unless you buy the racing version such as a CRF150R a boy will outgrow the power of them fairly fast.&nbsp; And they're heavier than a two stroke so you have that going against you.&nbsp; Here are the pro's and con's and some of the ways to deal with some of the con's.Two stroke-65 or 85 cc'Harder to ride due to an abrupt power band.&nbsp; You can put on a bigger rear sprocket to help take some of the hit out of the power band.&nbsp; This will require a new sprocket on the rear and a longer chain.&nbsp; so $100 or so.&nbsp; You can also install a heavier flywheel which is around $75 and it helps a bunch.&nbsp; But you need to buy a flywheel puller or have the dealer do it.&nbsp; Takes ten minutes to swap out but a special tool to do it.&nbsp; The two stroke race bikes have a much better suspension than the non race bike 4 strokes.&nbsp; So they're a little safer to ride in that regard once jr gets to giving it the wood.&nbsp; which he will fairly soon.&nbsp; Two strokes are much easier to work on in regards to engine work.&nbsp; And much cheaper for parts/labor.&nbsp; Four strokes-ie-KLX110,KLX125, CRF non (R) designations.&nbsp; Much easier to ride due to mellow power band.&nbsp; but not near the fun once jr starts giving it the wood.&nbsp; Expensive to work on and expensive parts.&nbsp; But pretty dependable at that displacement.&nbsp; The CRF150R is an excellent bike that kind of gives you the best of both worlds.&nbsp; Fairly mellow to ride unless your really on the rev limiter all the time then it flat out flies.&nbsp; Race suspension.&nbsp; Very reliable.&nbsp; expensive parts and labor if you don't do the work yourself.&nbsp; Very light an nimble like the two strokes.&nbsp; But they're loud.&nbsp; However, you can install an insert in the exhaust to knock down the noise some.&nbsp; The two strokes scream but it's not the same loud as the crf150r.</blockquote>

[QUOTE="eyexer, post: 70926, member: 315"] Lot of good advice on here. I've been involved with MX since 1980. There are pro's and con's to any bike you choose. two strokes are great but they are tough to ride for beginners unless you do some things to them to make them more ride able. Four strokes are easier to ride but require far more maintenance and far more cost to keep up or repair. All bikes hold their value fairly well now compared to years ago. So starting a kid out on a 65 two stroke for a year then to an 85 then a 125 isn't as big a financial hit as it used to be. Four strokes are more expensive initially but you get more for them at resale. However, with four strokes unless you buy the racing version such as a CRF150R a boy will outgrow the power of them fairly fast. And they're heavier than a two stroke so you have that going against you. Here are the pro's and con's and some of the ways to deal with some of the con's. Two stroke-65 or 85 cc' Harder to ride due to an abrupt power band. You can put on a bigger rear sprocket to help take some of the hit out of the power band. This will require a new sprocket on the rear and a longer chain. so $100 or so. You can also install a heavier flywheel which is around $75 and it helps a bunch. But you need to buy a flywheel puller or have the dealer do it. Takes ten minutes to swap out but a special tool to do it. The two stroke race bikes have a much better suspension than the non race bike 4 strokes. So they're a little safer to ride in that regard once jr gets to giving it the wood. which he will fairly soon. Two strokes are much easier to work on in regards to engine work. And much cheaper for parts/labor. Four strokes-ie-KLX110,KLX125, CRF non (R) designations. Much easier to ride due to mellow power band. but not near the fun once jr starts giving it the wood. Expensive to work on and expensive parts. But pretty dependable at that displacement. The CRF150R is an excellent bike that kind of gives you the best of both worlds. Fairly mellow to ride unless your really on the rev limiter all the time then it flat out flies. Race suspension. Very reliable. expensive parts and labor if you don't do the work yourself. Very light an nimble like the two strokes. But they're loud. However, you can install an insert in the exhaust to knock down the noise some. The two strokes scream but it's not the same loud as the crf150r. [/QUOTE]

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