421 serval lockup question.

[barahonapr]

alright well heres the deal, im wondering whether or not i should get a lockup for my shee. my setup is a 421 serval from FAST, 24cc domes, .046-.047 squish, +4 degrees timing, fast clutch kit with heavy springs, 35 mm pwk with k&n filters, shearer inframes, and i think thats about it.. let me know suggestions and advice please. thanks guys.

[sprinklerman]

I like running a lockup so that i don't have to run heavy springs. Makes shifting easier to me anyhow. I run 6 stockers right now (with extra lockup weight) and you can just flick the lever with 1 finger to clutch it.

 Plus you gain some extra fluid capacity which sure cant hurt.

[barahonapr]

so with me having heavy springs already..should i leave it as is or get one?

[sprinklerman]

so with me having heavy springs already..should i leave it as is or get one?

Itll work just fine with the HD springs you have. Its just more of a convenience thing to be able to run easier springs instead of the HD ones.

[trickedcarbine]

It will work ok with the HD springs. However.... It will take little to no weight to work with those springs and it will lock up faster and way harsher and almost cause a bog situation till you dial it in. If you spend the money on the lock up, get some lighter springs. The lock ups do two things. Keep the power to the ground by eliminating wheel and clutch slip(except when wanted), and make riding easier with lighter springs. I get flamed for it, but I reccomend a lock up on any bike. They aren't just for big motors. You can put them on trail motors and ride effortlessly. Mine is almost comparable to the 450's

[ATVridinMaNiAc]

It will work ok with the HD springs. However.... It will take little to no weight to work with those springs and it will lock up faster and way harsher and almost cause a bog situation till you dial it in. If you spend the money on the lock up, get some lighter springs. The lock ups do two things. Keep the power to the ground by eliminating wheel and clutch slip(except when wanted), and make riding easier with lighter springs. I get flamed for it, but I reccomend a lock up on any bike. They aren't just for big motors. You can put them on trail motors and ride effortlessly. Mine is almost comparable to the 450's

What type of lockup would you recommend for a fairly strong trailbike? im really leaning towards going this route.

[barahonapr]

alright thanks for the replies guys i think i got what im looking for now. 

[rjdgriff]

I was under the impression that if you had a stock tranny that a lockup would make it much harder to run through the gears under load???

[notsed]

i run the sling shot on my serval, ez pull clutch and stock springs and it fits under a stock cover, its so easy  to pull

[bangsheelover]

dd lockup

[trickedcarbine]

What type of lockup would you recommend for a fairly strong trailbike? im really leaning towards going this route.

Slingshots are awesome on a budget and mean you don't have to buy a new cover. They are also pretty easy to get close and just ride.

[barahonapr]

great thanks guys for all the input! 

[GleasmJA]

sorry to high jack.... who are some sling shot makers??

[trickedcarbine]

Gigot or driveline. Driveline also makes the Vito's one I think.

[ATVridinMaNiAc]

I see the gigot deal on ebay for like 300, so it looks like that replaces your oem pressure plate? Also i assume if you have a lockup clutch cover it will still work with this but its not necessary?