The fork information that you are referring to (45/50mm Marzocchi) is for the Enduro bikes, not the trials bikes.
Some technical data about your forks (fork oil quantity, viscosity, etc.), can be found in the owners manual, and the part numbers for all of the bits are in the Trials parts diagrams. I THINK that your 2005 forks take the same amount of oil and viscosity as do the 2008 forks (the trials owner manuals only go back to 2008 on the Beta site), so you should be ok starting with those specs.
You can download a complete Beta 2T engine service manual from the 'Support' tab on the American Beta website. Granted, it is for the 2009 to 2012 Evo engine but they are so similar this manual will work fine.
That said, if you have no experience in rebuilding a 2-stroke engine, and lack the few special tools needed to do so, perhaps you should locate a shop or qualified mechanic that might allow you watch whilst they strip, clean, inspect, and reassemble the engine for you this time.
The Beta is a very well designed, simple, robust, engine that with proper care will run quite happily for years.
The third annual MTR, Ryan Young Trials school is scheduled for 9 & 10 March, 2013!
The cost this year is $150.00 per student, which includes two full days of instruction by Ryan himself, lunch both days, and free camping at Tom Tschant's beautiful property in Shelby, NC.
Tom has a spacious heated shop with showers, restroom facilities, TV, the works! Roll out a sleeping bag in the shop or stay in one of the local Hotels close by.
The class is limited to the first 20 students to sign up; If interested, please send a deposit or the full amount to:
Janet McKenzie, reference the 2013 MTR Ryan Young Trials school
5851 Weddington Rd.
Concord, NC 28027
(704) 906-3238
For more information, please contact Jim McKenzie, (704) 906-3238, or email at: competitionwheels@gmail.com.
We struggled for along time to come up with the fees that we did, but by the time you add up all of the costs for scorecards, tape, loop markers, insurance, charter fees, website expenses, etc., etc. we are barely breaking even at that.
The economy (or the lack thereof) has hit our area particulary hard, and with the cost of gas sometimes we only get 7 or 8 riders per event, and we lose money on them. I believe that we need to have 12 or so riders show up to break even, and everything after that goes into the account to carry us on.
We are doing what we can to get more people and ride, but it's tough. Gas money and hotel expenses aren't as easy to come by for most of us right now, and I know that affects our turnout. Even the motocross clubs here are hurting; no more 400 - 450 rider turnouts lately, sometimes lucky to get 150 riders.
We are a small trials club near Charlotte NC, and have aligned ourselves with Bob Ginder and ITSA for the last two years, and are very happy with how they do business. The insurance has the same coverage as he AMA does, and is about a third cheaper. We charge $25.00 for MTR / ITSA club members and $35.00 for non-members per event. We like the ITSA rule structure and have a pretty wide array of motorcycles at our events, and ITSA has a place for everyone.
We had our first MTR / ITSA Regional Championship series last year with nine events and had a great time. Our trialsmasters offer lines for both modern and twinshock riders. We plan on the same format for this year too. We are holding our 2nd annual Ryan Young Trials school next month, and ITSA provides the insurance for the schools as well.
This years Ryan Young trials school was such a huge success that we are offering it again in 2012!
The two-day event will be held on 3 & 4 March, 2012 at Tom Tschantz's beautiful property in Shelby NC. (the same site of this year's class).
The cost is $200.00 per student; MTR is providing lunch both days for the students at no charge and a 2012 RY class T-shirt too! Class size is limited to 20 students, so if you are interested in attending, get your deposit in ASAP!
For this class, we are accepting a non-refundable $100.00 deposit with the rest of the payment due no later than two weeks prior to the event date. Hopefully this will make it a little easier instead of having to come up with the full amount to reserve a spot in the class.
Tom has a very nice heated shop with a shower and TV and he is offering free camping in the shop for anyone interested in saving some money on hotel bills!
More information can be found by visiting the MTR website at: http://metrolinatrials.com/, or by giving either Keith Bell at (919 454-1060) or me at (704 906-3238) a call if you have any questions.
maybe you are measuring something different to what we are talking about? I can take a photo and post it up if required to remove any confusion.
It is the fork tubes that are set non-parallel to the steering axis
I believe I know what you are talking about, and the fork tube "rake" is controlled by the triple-clamps/steering stem. No production twinshock trials bike that I am aware of has an adjustable steering stem so the triple-clamp rake angle is held constant. Some KTM models have an adjustable 2 degree offset steering stem, but the rake is held constant.
It's quite possible that one manufacturer or more has in the past built a trials bike with a "raked" triple-clamp but I have been a motorcycle mechanic for over 35 years and have owned two bike shops, one currently, and I have never seen one nor have seen in a service manual that dimension being called out.
I am in the process now of designing my own twinshock chassis's, and have a fairly large database of chassis geometry numbers, so if you know of a particular trials bike that has a "raked" triple clamp I would be very interested in seeing the numbers.
I have measured a 1975 TY-250, a 1981 Bultaco Sherpa T, a 1973 Montesa Cota 123, a 1976 Montesa Cota 348, a 2009 Beta Evo-125, a 2010 Beta Evo 250 4-T, a 2006 Sherco 2.9, and a 2009 Gas Gas 125, and on all of them the triple-clamps are 100% parallel with the steering axis.
The MTR Trials club is hosting a Ryan Young Trials School in North Carolina on 26 and 27 February 2011.
The location will be Morganton, NC at Powersports Productions "Moto-Land". We have an alternate location in Shelby, NC if the weather is too nasty in the foothills.
Retail from Beta for a new front rim is approximately $260.00, plus shipping. You should definitely NOT ride with a cracked rim, even on a trials bike. There are other rim choices available for your bike if you did not want to stay with the OEM rim. I do have a used one with a flat spot on one side for $75.00 if interested, and would be happy to send you pictures of it.
Hope that you guys will come and ride with us throught the season, we have five new semi-local areas that we are developing, and will be hosting an ITSA event mid season in 2009.
Rod Kit Install Difficult?
in Beta
Posted
Your bike (and all modern Beta 2-strokes) with the plastic inserts have full circle crankshaft flywheels.
The plastic bits on each crank flywheel are there to increase the crankcase compression ratio.
Be very careful with them, as they are not available separately and if you damage one you will have to buy a new crankshaft.
That said, there is nothing different in the procedure for rebuilding your crankshaft than any other 2-stroke crankshaft around today.