magnapoxy

There were quite a few versions of this 2 liter engine. most had timing belts- the engine in my truck is- G52B. japan industrial engine. counter balanced with timing chain. used in many fork lifts in japan years ago. America emissions required this to be a jet valve motor.. This mickey mouse idea was removed out of the head, replaced with bolts. 4 of them. - Got rid of the mikuni carb- put a weber 2 barrel on.- gas has been spendy forever in europe, weber knows how to build a carb correctly. -- it runs on 1 barrel 99% of the time, the secondary barrel used a counter weight to open it-- it stays closed unless the motor is really wound up. The carb has no power valve enrichment like nearly all usa carbs have-- holley - barry grant-- ect ect. I take off slowly-- do not lug or rev it-- sorta short shift it. on long up hills go into the truckers lane- go to 3 rd gear. There is one like mine down the street, old man has it-- told him, you ever sell it-- i am right down the street if it runs decently-- clear title- i have cash dollars. what happened to the good ol rigs-- several years ago- price of metal skyrocketed-- everything got crushed- sent over seas.darned shame. Oh, i only run non ethanol gas in everything i have- this is a big help for milage.

In full agreement with you Tiewrap !! Sumners never doped, even drank. Doctors tested him, they said his heart-lungs- entire body was better than any athlete ever tested in america. Meat &spuds type eater.

Yes, this photo is off topic, been saving it. This is Scott Sumners. usa gncc champion for several years in the 1980-s. Note the lack of strain on his face-- this is a xr 600 Honda !! The 80-s they were magic. I wonder, what the He#% happpened to the world----

I have never had to shut down a air cooled dirt bike from overheating. I had to shut down because i was overheated. Yes, liquid bikes will make more power. I would very much like to see brand new trail & trials bikes have option of air or liquid engines. dream on magnapoxy-----dream on---

Here is a new to me Bike. Asked Business owner to install slow throttle. glad he did ! The white truck - It has a header & a blown out muffler, Weber 2 barrel carb.. The Scorpa has a new spark arrestor fresh muffler packing. I like my truck.gets approx 45 mpg. Gasoline here in washington, non ethanol is nearly $4.50 per gallon.

The head is wasted. So is the main bearings-seals-upper & lower rod bearings on crank shaft. Bet there is a 1/4 tea spoon of metal in the bottom end floating around. Time for a total overhaul. I wonder if something entered tru the air filter side- or the screw-s that hold the reeds came loose. sad to see this. some of the marks on piston crown look like broken piston rings. 3 of the marks on head look like some other metal part that came apart.

agree. its a good looking mount you have. overhaul it. new everything- there are shops in western usa that will do this. yes its costly. bike looks like a keeper to me-- agan, i stress the importance of running non ethanol gasoline, the photo of the cylinder & piston sorta looks like phase seperated ethanol gasoline hammered it.--- just a wild guess-- pardon spelling mistake-- D.B.

No, I bought a 2020 scorpa factory 300 few weeks ago. More affordable for me. Graphics ? Motocross Action mag usually calls them Bold new graphics. I prefer "Stickers " lol. I have theones that come in the boxes of parts i buy stuck on the fridge in the kitchen-- As you can guess- i am a single man-- There could be a woman that would find my fridge door nice looking---- I will keep looking and sticking more stickers--

No. but i should be, looking at all the tools & parts i paid too much money for !!

Fork alignment. In my opinion, the only way to correctly to do this -- is to buy this and use it. Motion pro Fork Tru Fork Alignment Tool. www.MotionPro.com. This is for Aligning front forks to ensure that they are parallel from top to bottom. Bouncing on loose fork legs- grabbing front break then tightening fork axle is useless. any of these methods are. - The fork tool will greatly add to the life of fork bearings, forks will have less drag.

If your upper fork legs are smooth with no wear or blemishes you are lucky. Do NOT use the fork bushings when any of the black friction coating is worn down to the metal. it will destroy your upper forks in short order. As for fork seals & wipers, If you use old stock -they can harden with age and be prone to leakage. If the fork bushings that contact -rub on inner part of lower fork legs are worn down to metal-- usually copper-- it will be grinding away on much softer aluminum. not good.

The push button designs kill switches. I prefer Suzuki RM style. Sano dependable design. Try Motosport outlet in america. The genuine Suzuki button. Not some China clone, knock off.

Paint and stickers are nice enough I guess-- What i would like to see on all trials bikes is-- Air bleed valves on forks. Small oil drain screws on bottom of fork legs. Optional FMF style Turbine core spark arrestor style end caps on muffler. The bikes should also come with shop-service manual- Europe bike builders-- PLEASE study the shop manuals that KTM- bikes from Japan have closely. You can do it !! Pardon the spelling- Dave in Ephrata, Wa.

When Similar & Dissimilar metals contact each other it causes these areas to deteriorate. Example- where the connector wires enter the pins on the connectors. And- if the connector pins are not the same metal as the pin sockets . same thing. This uses lightly - 1st Flush unplugged connectors with CRC Electronic cleaner. Then Buy a small spray can of this--- Caig Labs G- series Deoxit Gold G-5. Use it lightly on connector pins & sockets. There are other final treatments that could be used also-- Example- nano particle silver in a low die electric grease.---- Apply with a q-tip - lightly. A good electronic & high end audio store will know about these items-- I use these items all the time- rebuilding & building home audio equipment. Do NOT use carb or brake cleaner on connectors- it will destroy plastics.

Hello to all. Looking at gas gas txt 250-280-300 cc bikes. On one site it was said these engines comply with euro - 5 standards. Does this mean they are jetted lean ? And or do they have a cataltic converter hidden in the exhaust system ? Also, anyone know what brand of rear shock is on 2021 Bets 300 ss ? rebuildable ? I have asked dealer when the 2022 Beta trials bikes will be shipped to America-- no one has any idea here--- Pardon the spelling mistakes--

That far too much money for the quart. I buy Sunoco 110 leaded 5 gallons for $65.00. You do not need that stuff though. Try to find a gas station that sells non ethanol gas. use that. If you have troubles finding non ethanol gas- use the phone book- look up a chain saw-small engine repair shop-- they will know-- If you go to a saw shop-- ask to see some pistons they have removed from 2 cycle engines that had phase seperated ethanol ran tru them-- they look like someone took a grinder to them. -- you have a great looking mount there - hate to see the bike get wasted from a bad load of junk gas--

there is a company on line.----- dcplastics. they have rear fenders for techno --- 58 dollars. trouble is-- its for 94 to 97. i did buy one for a spare for my 97. have to wonder if the owner could be talked into making parts for other years?

Thing is- the betas frame is the gas tank. not e-z to flush out to put it with out cuss words-- lol. the fuel tap does have a rather crude plastic screen in gas tank-frame. There is also a cross over tube for the frame rails above the carb. this gets hardened and sometimes leaks. I only run my petcock on reserve. When petcock is on main, it draws fuel from a too small plastic tube that extends about 12" up into fuel tank-frame. Its a hassle to make it sano- look proper but it can be done- i added a small slintered bronze fuel filter from carb gas inlet to petcock.--- and i only cussed 1 time-- under my breath of course-- did not want to frighten the shop dog--- lol !

My 97 techno 250 sometim es slobbered gas out of the vent tubes on carb while removing it from the bike stand. Removed carb- float bowl. float arm was correct. Replaced the old style metal to metal needle & seat assembly with matched set- assembly.-- The new needle has a Viton tip. I see you are in Colorado - I bought the needle & seat assembly from a on line shop in oregon- Itscalled- PJMotorsports.com. The float bowl gasket was found on e-bay. I will have to search that out if you want. Not saying this is your bikes issue, It did bring my Mikuni back - no leaks, if the fuel is left on it no longer leaks sitting or when bouncing the bike around. running or not.

My 1997 Techno had a worn out crossover tube above the carb- this tube feeds fuel from the frame - gas tank. I replaced the tube while the carb was off the bike. Replaced the gas petcock also. I never run the petcock on its on position. only use reserve position. on position feeds gas tru a too small tube that is too long. some rides i go on are 1st & 2nd gear VERY steep for 2 or more kilometers constant, bike will starve for gas. No i have never rode a proper trials event -- i am 62 years young- started riding at 6. -- every dent, chip on my riding gear has a story to tell-----

You could fit a piece of plastic under the fender - drill & rivet with back up washers on both sides of the rivets--- it may look rough, but function beats looks anyday.

I am in usa. This is what i use.

I have a 1997 techno 250. I use a coolant called Engine Ice + 1/2 oz red line water wetter.. Have also installed a higher flow water pump impeller kit.