421 CUB

[dajogejr]

Talk to Andy @ M&M ATV. There's a new cylinder out called the serval....I think it'll be better suited for what you want.

It's probably got 10% less HP than a cub but a much more friendly power delivery and usable power delivery unless all you do is drag race.

 

Drag racers don't need low end or middle...just all top @ WOT.

 

Once you get into 80 HP territory, plan on beefing up the clutch and doing shifting mods.

 

At the very least, get every other dog cut off on the trans...but a dunable override is the ticket.

There's a thread on here about the Serval Cylinder... Pricing is about the same as a cub, just a little cheaper for the cylinder.

 

Plan on:

Cylinder

pistons

crank

You do NOT need a TZ bearing, OEM will be fine for what you're doing. If you have the EXTRA Cash, maxload bearing.

Upgraded clutch basket and clutch, possible lockout

Tranny mods (cut gears or override)

Longer swingarm

Longer brake line

Bearing carrier (if you ran an extended stock style swingarm someone should kick you in the nuts...lol)

Carbs, pipes, fuel valve.

New Head with domes

Timing plate

You can make it a pretty fun ride keeping it conservative with pump gas...but compression and timing is where the power is.

[KickStartMyHeart]

Talk to Andy @ M&M ATV. There's a new cylinder out called the serval....I think it'll be better suited for what you want.

It's probably got 10% less HP than a cub but a much more friendly power delivery and usable power delivery unless all you do is drag race.

 

Drag racers don't need low end or middle...just all top @ WOT.

 

Once you get into 80 HP territory, plan on beefing up the clutch and doing shifting mods.

 

At the very least, get every other dog cut off on the trans...but a dunable override is the ticket.

There's a thread on here about the Serval Cylinder... Pricing is about the same as a cub, just a little cheaper for the cylinder.

 

Plan on:

Cylinder

pistons

crank

You do NOT need a TZ bearing, OEM will be fine for what you're doing. If you have the EXTRA Cash, maxload bearing.

Upgraded clutch basket and clutch, possible lockout

Tranny mods (cut gears or override)

Longer swingarm

Longer brake line

Bearing carrier (if you ran an extended stock style swingarm someone should kick you in the nuts...lol)

Carbs, pipes, fuel valve.

New Head with domes

Timing plate

You can make it a pretty fun ride keeping it conservative with pump gas...but compression and timing is where the power is.

 

 

I guess u can try to keep me in the nuts for running a stock style xtended swingarm but its not gonna get u anywhere. Many people have tried, but they all fail. I run one just because it was FREE. My friend had one and just gave it to me. TZ bearings, why wouldnt you build the bottom end bulletproof? Why would u spend all that money and not spend an extra $100 to put a badass bearing on it. All it is is just extra insurance and piece of mind. To me "piece of mind" and knowing that I did everything I could to make it bulletproof and know that it was built with the best parts my checkbook would allow. You do what ya want tho.

[dajogejr]

If you had to pay for it...and $ was equal, would you buy an extended stock style swinger or would buy a roundhouse.

 

You mentioned buying the best your checkbook would allow...and that case, a roundhouse carrier is CERTAINLY the best.

 

Aside from that...if he's going to get a TZ...why don't you throw another few hundred in for straight cuts.

Because common reasons for having straight cuts is a TZ bearing, right?

 

I'm not saying he shouldn't get a TZ bearing IF he has everything else. All I'm saying is they are icing on the cake if all the other ingredients are there.

 

Maxload is a great bearing, cheaper...and he's only building a 4 mil cub.

[okbeast]

I agree and I disagree wit that statement. It doesnt take much to clean up the casting. Why wouldnt ya do it if U already got the cylinder off??

 

Cleaning up the casting flaws and porting are a bit different. All the cubs come "cleaned up" usually, but can be ported further to get a little more out of them.

[J-Madd]

I think he means that it usually doesn't cost anything extra to clean up the ports.