dan williams

Today I learned the importance of loctite. Since we have a month long layoff for events in July I was going to tear into my shifter mods and check for wear and whatnot after tomorrow’s trial. Well trail riding with my wife and a friend today the EVO started making an ugly sound. Just disassembled the primary drive to find the cam screw backed out and was hitting the rivets on the back of the clutch basket. The good thing is it’s an easy fix. Also the custom indexer still looks great. Bearing is tight. Phew! Lucked out this time. This is why I don’t offer anybody these parts until I’ve run them in for a while. Never know what you’re gonna learn until it happens. (But yeah I’m an idiot for not using loctite)

Thanks for letting us know. Please let us know if that fixes it. Knowledge shared is knowledge multiplied.

With the VForce reeds when I first started using them I’d pull the carb and “fine tune” the jetting only to end up exactly where I started out. Now I just bolt them in and go riding. Aside from a better primary case charge at low rpm there’s really not anything about carbon reeds that should affect the jetting. If your jetting is correct to start with it’s all good.

I’m pretty sure that what Bernie will be starting with is basics that will improve your riding no matter how your bike is set up. At 210 you could do with heavier springs but in reality the bike is 25+ years old and technology has moved on so just adjust it to where you’re happy and ride the snot out of it and enjoy it until you can upgrade to a newer bike.

One other failure that happens is the plastic impeller in the water pump breaks. I highly recommend the high capacity metal impeller from Jitsie.

And that you have coolant.

There's lots of knowledge on here. Granted it's a bit of a slog to get through. It's pretty typical for newbies to worry about how their suspension is set up though the usual thing that happens is they mess with it until it really does need adjustment. One thing that will make the forks not travel properly is if there is too much oil in the fork legs. It's not uncommon for rookie mechanics to overfill Betas. The end result is the fork travel is short and ends like hitting a rock. Tough on the wrists. So if your forks are a bit stiff then you can probably tweak the preload. If they just suddenly stop halfway through the travel they may be overfilled. The way Beta specs oil level in their forks is frustrating. With the spring out and the fork compressed the oil should be some distance from the top of the leg. The other thing that I found weird on my 2018 is the oil is spec'd at 7wt which is pretty thick. I changed it to 5wt and am happy with it. Also the forks are now made by Sachs and are a bear to get back together if you pull them apart. My recommendation for draining the oil is take off the front wheel, take off the brake caliper, loosen the top triple clamp pinch bolts so you can loosen the top caps and then loosen the bottom triple clamp pinch bolts to drop the fork tubes. Then just turn them upside-down to drain them. You'll have to pump the cartridge damper side to get most of the oil out. Stick them back in the triple clamps and refill to Betas spec. The fill levels should be in your manual and if you need to see a manual on-line look here, https://www.betausa.com/content/support

Ignore the videos. Your weight is fine for the stock springs. There are two adjustments at the top of the fork. The large allen head bolt is spring preload. The slotted screw is rebound damping. Always start any adjustment of damping with the adjuster all the way to the right. Turn it until it stops clicking and back it out ten clicks. Adjust the fork preload so when you bounce on the bike the fork and shock compress the same. Then go ride some sections and tell us what problems you are having. Front end won’t track on bumpy turns, can’t get enough lift from the rear on hits... There is no one size fits all answer and the setting of sag is a ridiculous over simplification.

Go here and look for the Trials Service Manuals at the bottom of the page. They are for newer bikes but they may give you some insight as Beta haven’t significantly changed their design for years. https://www.betausa.com/content/support

I was thinking about guy’s need to pee on trees. I think it’s natural selection at work. My theory is ancestors who didn’t pee on trees all died in forest fires.

Yeah me too for about 6 months but there’s no denying the convenience of just being able to park it without finding a tree.

To be honest I didn’t crawl under to look. But I suspect they do as I screwed in stainless replacement bolts to check the threads and pulled out some steel thread material that didn’t come from the stainless bolts or the OEM bolts.

It would help but there’s a lot of torque required.

I had to pull the footpeg brackets and drop the bottom suspension linkage. Was still a pain in the derrière.

The stand itself is OK but access to the fasteners is, to say the least, less than user friendly.

I don’t know who designed the Beta kickstand but they should be flogged.

To soften mine I went with the low compression head, 2 teeth added to rear sprocket and carbon fiber reeds. The low compression head helps reduce the top end hit and makes it a bit easier to kick. The carbon reeds improve the low end torque and make the power more linear. That helps control. The lower gearing just slows everything down. Trials bikes are often geared up for the European market where they may have to run on the street for short periods between sections. Where the loop is all trail that’s not of any benefit. Control setup is critical and you can find a lot of info just browsing this site. One thing to keep in mind is you’re new. You will get used to the power and in time you will come to rely on it. Right now though it feels like you’re drinking from a firehose every time you twist the grip. The factory bike you have may also have the fast throttle tube (white) there is a black throttle tube that is about 20 degrees less turn that you may want to put on.

Bag ‘o cams. Wonder if they’ll work.

I’m worried the spring might get cocked sideways and act weird. I know that’s poorly said. I also only have the machining capability afforded by a vice and a dremel. It’s easier (but not cheaper) to farm it out to eMachineshop. Oh well that’s what the day job is for. To pay for what I want to play with. Day three out with the custom indexer and still flawless. Starting to get my confidence back. Modifying the pin to flip the bearing will probably be my last modification on this issue. Already over $900 in the hole. But I’se gotsta know.? But I’m back to lovin’ my bike again and how much is that worth?

For those following along on the home version of WTF is Dan doing now. I think a change of plan. Instead of re-re-designing the cam to make the bearing line up properly I'm going to try something different. The way it sits now the bearing is offset from the center of the cam. Rather than offset the cam I'm looking at something much simpler (famous last words). Making the pivot pin 3mm longer and flipping the bearing to the other side. This allows the bearing to be centered using shims if necessary. I just have to crack the motor open again to see if there is adequate clearance to fit the indexer arm with the bearing flipped.

Is there any place to get nano-trans in the US?

Cork stuffers? Wow. Never heard of that.

None of these bikes adjust ignition timing based on temperature. Certainly not something with razor thin profit margin like a tiddler. Your problem is either a faulty ignition or more likely carb/mixture possibly an air leak. Is the current jetting set to stock values? Are you certain the carb is assembled correctly? Have you tested for air leaks with hot start? Are the reed valves intact? Is there anything blocking the exhaust? It’s important to start from stock jet values with a properly cleaned and assembled carb. It’s very easy to chase around in circles if you don’t have a known starting point. Not diagnosing but just reference, a cold engine requires more fuel in the mixture to help vaporization. Do you have to use the choke to start it cold? If not that would indicate a blocked air passage or a choke circuit that is not shutting properly.

SIT REP as Jeremy Clarkson would say. Second day out on the bike with custom indexer installed and stock cam. No false neutrals and shifting on the loop very positive. A couple of times a shift wasn’t right on and a split second later the box snicked into gear on its own. Strongly points to my original issue being the wonky bearing on the indexer.

Fair enough. I was happy to see a pinch bolt on my ‘18.