let's talk about clutch springs

so my hobbit is pretty fucking fast right now. great top end, awesome mid range pull, pretty good low end. but here's the thing, i want that fucker to throw me off the back when i nail the throttle. i was thinking about trying to find stiffer springs for the clutch, so it will grab at higher rpms. it seems like it would work, or am i way off on this? maybe i'm just tired, but this seems like the only way to make that happen. unless you have any other ideas. what do you think?

Re: let's talk about clutch springs

BootyClap Ninja /

that in conjunction with gearing a bit lower should give you just sickly low end.

Re: let's talk about clutch springs

You can't gear a Hobbit, unless you buy the Malossi racing gears.

What should do the trick:

A different (performance) variator

Lighter weights

Stiffer springs

You can do all three of these things, but you can also do em one by one. The lighter the weights, the longer it takes for them to start pushing outwards. The stiffer the springs, the longer it takes for the clutch to grab. And a different vario might give you some more top-end and will definately get you a lot of low end.

Re: let's talk about clutch springs

Raymond Rexroad /

Here's my two cents:

A performance variator will not help you with your launch.

One of my two Hobbit does have stiffer clutch springs, and yes, the "launch" is certainly "harder". The clutch springs do not engage until a much higher RPM, and the clutch, when it does engage, does not engage smoothly, but rather hard. The engine revs are up and when the clutch engages, the revs drop rather abruptly. I've heard others say that it almost caused them to wheeley (sp?), it was so abrupt.

Ideally, the clutch would "slide" or "slip" until your moved from a stop and coming up to speed, but it doesn't work that way. Think of driving a manual car with a "tall" rear axle ratio - you rev it up and drop the clutch - it's kind of like that. You get off of the line quicker, but the clutch, once engage, still has to "fight" against the tall rear axle ratio.

Is that bad? No, I don't think so - I think it is a preferential thing. Both my Hobbits have Leo Vince exhausts (both 50cc, one ported one stock porting), and the power band on both is higher than stock. That, combined with so many hills in my town, and the fact that the speed limit in town is 30 MPH (or less), combines to mean that I'd rather enjoy 0 to 30 MPH acceleration than have top-end speed. Given that set of facts, I'd rather have the stiffer springs on both of my Hobbits. I'd already have another set now, but my original source (Treats on ebay) told me that he did not have any more.

Also, a different variator is not necessary to help you with acceleration. If you haven't done so, just replace your variator weights with a lighter set. It will help immensely with your 10 to 25 MPH acceleration. There's some info in the Wiki on this topic.

Re: let's talk about clutch springs

i notched my variator and drilled out my weights to about 10 grams. eventually i would love to get a performance variator, but for right now i'm totally happy with the modded one. i have no complaints about my performance really. it does have pretty rad low end (it kills every other ped that i have off the line), but i kind of want it to wheelie. i have been searching for stiffer springs, but i can't seem to find any. does anyone else have a source for these?

i would love to get the malossi racing gears, but they are pretty much impossible to find, from what i can gather.

Re: let's talk about clutch springs

Raymond Rexroad /

i have been searching for stiffer springs, but i can’t seem to find any. does anyone else have a source for these?

I actually just bought a set on ebay, but haven't received them yet. If they fit, and work, I will pass the info along (and update the wiki).

i would love to get the malossi racing gears, but they are pretty much impossible to find, from what i can gather.

Yes, true. However these gears will hurt your bottom end - but they will help your top speed.

Re: let's talk about clutch springs

Just FYI, Treats has lighter weight sets (Stock Honda!) for those of us with no scale or drill press. Good stuff, do not know what weight they are.

Re: let's talk about clutch springs

he says they are the light wieghts, so i'm guessing somewhere around 8 grams.

Re: let's talk about clutch springs

ok, my buddy gave me a couple of sets of springs to try out. so new question. how do i get the damned drive clutch off without the puller they say to use in the manual? someone has to have some tricks for this bastard. hook me up!

Re: let's talk about clutch springs

what the fuck? speedsupplies.com has the damned clutch puller i need for about $25. not too bad. i would pay it. BUT THE SHIPPING IS $19!!! and thats just standard shipping. bullshit. total bullshit.

Re: let's talk about clutch springs

do you think a honda dealer might have a puller? or is this not really used anymore?

Re: let's talk about clutch springs

The Honda motorcycle dealer just might have a puller. If not, he can probably order one.

If that doesn't work, you might be able to use a 3-armed bearing puller. I don't know the shape of the part you're trying to remove, but this thing has saved my life a couple of times ;)

If you buy one of those, get one with thin arms, because moped parts usually don't have much clearance around em ;)

Re: let's talk about clutch springs

Raymond Rexroad /

Just FYI, Treats has lighter weight sets (Stock Honda!) for those of us with no scale or drill press. Good stuff, do not know what weight they are.

Yes, based on the picture of his weights - Treats is selling stock PA50I weights. I will add that his price seems way too high - based on what this forum's user's have been buying them for.

Based on my own testing, PA50I weights are too light. I like 10 grams myself.

Re: let's talk about clutch springs

Raymond Rexroad /

If that doesn’t work, you might be able to use a 3-armed bearing puller.

I caution anyone trying to use a three-jaw puller. The metal on the clutch is not strong, and the clutch will most likely get ruined this way.

I just bought the Honda tool. I remember trying a three jaw, but just couldn't get a grip on the clutch. I remember reading about others experiences with a three-jaw puller, and how the clutch didn't survive.

Buy the tool - it can be used on the clutch and the rear driven pulley. It's worth it.

Re: let's talk about clutch springs

Oops, didn't know about that. Puch stuff can usually take the beating it gets from a 3-leg bearing puller. Atleast my stuff always survived ;)

Re: let's talk about clutch springs

first and foremost i'm going to the honda dealer and see if they have one i can use. even if not, i can probably order it from them. they get all of there shit super fast and no shipping. good deal.

yeah, i was up all night reading horror stories about people who ruined their clutches with the 3 jaw pullers. no thank you.

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