mcman56

I had a silmilar issue with the helicoils for the rear skid plate mounts on a Rev3. EZ lok worked great. As I remember, the pilot hole size for the EZ Lok was the perfect size to clean out the threads for the helicoil without removing any extra material. (10 mm screw?) It also used a standard sized tap as opposed to some other brands that required special taps.

Fasdr - I went from a Sherco 290 to the Beta 200. On the 200, it was harder to do semi vertical wall type obstacles, like 4 feet high or so. On the larger bike, I could chop the throttle at the bottom and the larger engine would continue to pull me up. On the 200, I would have to continue to use throttle to make it to the top. This created another task for my small brain to manage and posed a risk of using too much throttle and flipping over. This was not too bad a sea level but made me pretty uncomfortable at 5500 feet elevation. At around 7500 feet the 200 felt quite weak and I had problems with it bogging when opening the throttle. Even small logs were an issue. I did add a bolt on flywheel weight when going to 250cc so that is part of the equation. As a 250, the Beta was more like my old Sherco. The only negative is that it takes more effort to kick. There was another posting on this issue a while back and someone suggested that 270s had an extra weight. Spatwydawg - The crank and rod do have different part numbers on the parts list. From what I can tell, the difference is the bronze bush pressed into the rod small end. It is not shown as a separate part on the 200 list. The only economical way is to buy a used top end of the desired size. They show up on ebay but for me shipping UK to US was not cheap. The cylinder I used does not match the year of the bike. I noticed that Beta sold 270 kits for 250s but there were different kits for different year bikes. I never found out what the differences were.

I went 200 to 250 on a 2008 Rev3. Looking at the manual for the evo, it is pretty much the same engine except that the coolant connection on the head points in a different direction. In addition to the 200 top end, the small end of the rod is bushed down to accept the smaller 200 wrist pin bearing. (that may be gudgeon pin to you) I think trialsandtribulations sells (sold?) a special overside bearing that eliminates the need for the bushing. The carb was the same on the rev3. I have only seen one 125 evo but it had the same PWK28 that the bigger bikes have so the carb may be the same also.

I'm not running the linkage but did replace the two pieces recommended by tlmark. Shifting does feel more secure but now I have a bit of clutch drag so it is hard to tell. The clutch components looked like new and I reassembled with correct placing of steel and fiber plates. However, I did not ensure that the plates were in the exact same place as in fiber plate #1 may now be fiber plate #3 etc. Could this need a little run in to loosen up?

How does the 300cc 4t compare to a 250cc 2t in kicking effort? Is it harder or easier? Overall, is it harder or easier to start? Is the kicker higher or lower from the ground? The 2t kicker is a bit high up for those with short legs.

Over time, finding neutral when stopped on my TLR has become very very difficult. Is this likely a clutch issue? If it needs replacement are there any options to OEM Honda? On the flip side, it is easy to get hung up in neutral when shifting from 2nd to 1st while moving. Is this normal? It may be getting worse over time also.

This is all great input and things to think about. Dragging the rear brake is easier on modern bikes so that must be a part of it or maybe a way to work around it. Looking for play, the front sprocket seems fairly loose/ wobbely on the splined shaft. A newish, low mile sprocket feels kind of the same so maybe that is normal. My Rev3 has a much tighter fit in that area. Is there any way to tighten this up? The chain tensioner spring also seems pretty weak. Would a new one help or is it even available? Is it possible to take out a coil or two out?

You can skim the head on a lathe. To avoid an increase in compression, base gasket thickness can be increased. Beta sells them in different thicknesses.

I have a Reflex version of the TLR200 and am feeling some drive line free play. I notice it when rolling off and then on the throttle. There is a point in the middle when the engine does not feel connected to the ground for some short time period. It makes precise control difficult when it gets reconnected. It is really noticeable when riding it after coming off a modern bike. I don't think it was always like that but am not 100% sure. I have replaced the bushes for the rear sprocket and the chain tensioner is adjusted per the manual. Is this normal? Is there any kind of cushion drive in the clutch that could be loose?

Green sticker registration is good to ride all year any where in state on public lands. Red sticker can not ride in high smog areas in high smog times, basically summer near cities in valleys. All bikes 2002 and earlier are OK for green stickers. For newer bikes, including 4t enduro type bikes, manufacturers have to go to a lot of trouble to get them green sticker qualified. Based on the number of trials bikes they can sell in CA, it probably is not worth the expense. Sad but true.

Did you buy it in CA? I thought there was a new law last year requiring the dealer to obtain registration.

Will the new 4rt be CA green sticker compliant?

I have reused them successfully but also used a sealer. http://www.2wheelpros.com/permatex-copper-spray-a-gasket-9-oz-2359961.html?gclid=CJHr4_SbzrsCFYVlfgodQDMANg

Can someone explain why Betas neeed a hotter plug in the UK? Temperatures are similar in other parts of the world. UK bikes come with flywheel weights but I think that would be more load on the engine and actually increase temperature slightly.

I posted that original picture. This was a street bike so I assume it twisted during some sort of crash. When I assembled the bike with a 428 heavy duty chain, the chain was touching the inner primary cover. I needed to do something and was able to bend it back. I had a steel motorcycle carrier that fit into a 2" trailer hitch. A bike would ride in a long piece of steel channel about 5" wide across the back of the vehicle. It was a bolt together so that I could assemble it with the flat side of the channel facing up. I welded tabs on the flat side that would mate to the footpeg mounts and lower motor mounts on the frame. With the hitch slid into the carrier on the truck and the frame bolted in place, it was pretty securely mounted. I then made a pin that was a close fit in the swingarm pivot and put it in the end of a long piece of 1 1/2" pipe, maybe 8 feet long. This became the lever arm to twist it back. I had to use heat from a propane torch to get it to move but was able to move it into visual alignment. I did get hear one "tink" in the process but could not find a crack or any other defect so am not sure exactly what moved. I made a close inspection after riding in multiple rocky trials and it continued to look good. When placed on a flat surface, I could see that the swingarm was also bent. It was pretty easy to straighten so I don't remember the details. I think I mounted in a vise and used a lever or maybe hammer. I found a picture.

I have an O ring chain on a rev3. I did a little bending and a little sanding plus had to run the master link clip on the inside.

I'm considering a new Evo 4T but so far have not gotten to try one. I see that it is a 5 speed and recently read somthing about it having a big gap between a couple of the gears. Can anyone comment on that? Are the ratios listed somwhere? Does it make it a poor trail bike (vs trial bike)? The 6 speed Beta's and Gas Gas seem to have a near perfect gear for everything. I did have an 02 Sherco that had a big gap between 3rd adn 4th (I think) It was annoying on a trail ride. Is the Beta 4T the same?

I had a 2002 Sherco 290 and it had a big gap in the gears. I think it was between 3rd and 4th. That made it a poor trail bike for me. Do the new Beta 4T still have the same transmission?

Is the weight the round disk behind the gear in the last picture? Is it as heavy as the bolt on flywheel weight? http://www.ebay.com/itm/Beta-Rev-3-250-Engine-Bottom-End-Crankcase-Gearbox-Breaking-Trials-/261334134831?ssPageName=ADME:B:SS:US:1123

Your local trials club (PITS) uses "no stop" rules for Saturday events. AHRMA events are also run that way.

I have spent time looking at the parts lists. From what I can tell, the difference between the 250 rod and 200 rod is that the 200 rod comes with the bushing installed. It looks to be the same case with the complete crank assembly. As far as flywheel weights, I beleive UK sold bikes are delivered with the weights installed but US sold bikes come without them (less mud). It also looks like the ignition changed somtime on the Rev3s and the hole to hole difference on the weights have to match the year of the bike. My 2008 has an ignition made in someplace like Slovenia. One thing I do not understand is that I have seen flywheel kits for sale that include a spacer for the ignition cover to make space for the weight. My 2008 has plenty of space without any spacer. Does anyone know why that is? Maybe that is for the "other" brand of ignition. IMO appreciation of a flywheel weight is a personal preference thing. It slows down engine response and makes the bike much more contollable in slick and slow conditions. This can make abruipt steps more challenging. With a weight, there is also a lot more run on when the throttle is closed. I like that run on when going up short walls. You can approach the wall, hit the throttle for power, chop the throttle and then let the weight pull you up the wall with no need to use throttle. However, I have a ridding buddy that rides the same things as me and he hated a weight. That run on gave him an out of control feeling. After that long winded message, I realized that I did not answer the question. I believe the flywheel weight is item 23 on page 6. It is just a flat plate that bolts on the outside of the flywheel so it is very easy to install and remove. That page also shows the spacer, item 26. It looks like this: http://shop.americanbeta.com/p/flywheel-weight-kit

Can someone tell me how to remove the liner from an Airoh helmet. The side "ear" pieces snap out. The rear of the main liner also snaps out but how do you get the front of the main liner loose? Are there instructions somewhere?

I get a similar but slightly different number. The CR is BDC volume/ TDC volume. Head volume is included in the BDC volume so the head volume would be more like 26 cc. The new condition would be 308/ 38 or 8.1 CR. I just tried to paste in somes spread sheet cells but the format got lost. I did run a 1/16" (1.5 mm) head spacer on a 250 Techno. It ran fine. The only unique feature was that it would tolerate being pushed down to very low rpms with a heavy load.

Can you post a picture of what the head spacers look like before they are installed? I would be interested in seeing what a Rev 3 head spacer looks like. The really low published CR may be from a Japanese bike. They tended to calculate an "effective" compression ratio. For this calculation, the stroke was from when the exhaust port was closed by the piston to TDC. This produces a smaller number but tries to give importance to port timing.

I made a 1/16" thick head spacer for a 250 techno that my 4'10" 100 lb daughter was trying to start. It used o-rings instead of steel gaskets so was a bit different. It sealed with o-rings on one side and just RTV on the other. It ran OK and still does 8 or so years later but with fresh piston and rings was still too hard for her to start. With a mill and turntable, the spacer was not too hard to make. The Rev 3 steel gasket is also a water flow restriction so that would have to be considered. The Rev 3 200 is a small bore 250/ 270 and not a big bore 125. It uses a bushing to reduce the small end rod diameter but all else...carb, exhaust is the same. I converted a 2008 200 to a 250 by installing the 250 top end. I have been planning to put the low hours 200 top end on ebay but have not gotten around to it. If you are interested send me a PM. I also think there is an older 200 cylinder on Uk ebay right now. The older ones used a steel sleeve but the 2008 is all aluminium. I don't know when Beta made that change.