MOD: Stock clutch get more bite (simple)

I went about tightening the spring a bit differently. Instead of cutting the collars or tightening the collars completely, I added a washer(s).

After trials, I ended up using one washer but I do run the RDM pressure plate and a mix of RDM hard pads with the white/black stripe CG pads.
IRC, the washers measure 27.5mm OD x 20mm ID. They fit the clutch shaft exactly.
They were cheap…ebay... $3.75 shipped.


The thing about spring compression is at some point, more compression will not give more force.

I occasionally deglaze both sides of the pads and outer plate. This holds sufficiently well.
With all this extra hoopla I can still slip the clutch if I abuse it.


Haven't test drove the Minarelli Monster yet after completing this with a DLH Budget Saf clutch installed also. I couldn't get the SAF clutch to grab and turn the basket gears with the inner spring and hardware removed. Yes it's attended to rely on the outer clutch plate springs. Problem is it doesn't work out so well with a China Doll plate! I will come back with results soon, perhaps remove the clutch and show others the effects within a month. That way we can see live results. I was going to order RDM but then I read their online reviews and saw that I basically have to back order and wait 2 months to receive something purchased! I rather just wait when he claims to have something back in stock.
 
Just did my minarelli monster. Lost a SAF spring out and about!!! So I went to the nearest Ace Hardware and picked up the strongest springs i could get. No spec on what they're rated at. However I was having alot of trouble with hurting my hand the clutch being to stiff! Now that I replaced the springs and bolts the tensions just right with the inner camshaft spring it's not super stiff on the printer spings! I'll let you all know once i put enough miles to tell you the results of the inside of the bike!
 
Just shaved one down and doing this with a DLH SAF clutch combonation. Only way to tell is over time!!

Either or with my setup the pin WILL need to be replaced very soon!
this mod has only been tested on stock clutch setups and mainy works because of the extra plate. Not sure how any of this will work for your highly modified clutch. Please let us know what worked for you
 
this mod has only been tested on stock clutch setups and mainy works because of the extra plate. Not sure how any of this will work for your highly modified clutch. Please let us know what worked for you


So far great. Just need to put some serious rpms and miles. This Minarelli was ported by Don Butler so it's a beast. Hooked up a rpm gauge to it today it's roaring over 13rpm and i haven't gone past 65 yet! So I'll let you know after taking if off in a month or less if it fails haha!
 
For everyone's record for the time being. Using this mod with a budget dlh saf clutch and lesser lbs pound springs is amazing this far on a Minarelli. I barely pedal and give the throttle s few bloops and go a few feet and in the engine fires right up.
 
Do after some heavy use on this mod. It stil works. Here's results of Nick's recommendations with a little improvisation. Which will be my next test run. Mind you this was done for a Minarelli fully ported.
 

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I am curious to see how well the retaining pin for the lower seat holds up with the increased seated pressure on the spring. That is the biggest weak spot of the whole design.
 
Not a big deal only time can tell... So far no grinding. But that's with only 6.2hrs running.
 
I am curious to see how well the retaining pin for the lower seat holds up with the increased seated pressure on the spring. That is the biggest weak spot of the whole design.
I just found a piece of round bar that was the same size as the hole then hardened it by heat treating it and cooling it in olive oil. Solid as a rock
 
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