Jump to content

73tr6

Members
  • Posts

    3
  • Joined

  • Last visited

Contact Information
 
   
Recent Profile Visitors
 
 

The recent visitors block is disabled and is not being shown to other users.

 
  1. I have a plastic tank, not lined, from a well known UK supplier and used ethanol gas for 3 years now. So far no problems.
  2. Try vintageMX.net. There is also a guy who is in Nevada who has a field full of old Bultacos and parts: Lynn & Dorothy Mobley 1320 Cathy Lane Minden Nevada 89423 bultaco@nanosecond.com (775) 267-2103 Mobley’s Bultaco Parts 1988 to 2013 - 25 years Bultaco Marque 1958 to 2013 - 55 years Bultaco factory/company closed about 1980 ** Still going strong May 1, 2015 ** New batch of pistons/new sizes just arrived * Call Lynn Monday-Friday PACIFIC time, mornings are best. * We ship promptly and take VISA and MasterCard. * We work out of our home, we are not a storefront shop. * All visits are by specific appointment only. * We are always closed on Sundays and major holidays. * We are usually gone mailing, eating and other errands around the lunch hour. We stock parts to keep your Bultaco engines running, such as pistons, rod kits, seals, bearings, gears, gaskets. We regularly stock flywheel pullers, petcocks, points, brake, clutch and throttle cables. We have frame pieces such as swingarms, levers, shifters, grips, seat foams and covers. Trim pieces, fenders, side panels, gas tanks, seats, and such are harder to find. We may have parts as NOS, used, or reproduction. We buy and sell daily so what we have changes constantly, therefore we have no inventory list, catalog or lists by model number. Many parts fit several models. We have parts books specific to most models, with exploded pictures keyed to part numbers ($25). Our Workshop Manual has lots of how-to pictures, but not specific to a certain model, 100 2-sided pages in a binder, plus a Quick Reference Chart ($45). We bought out many Bultaco dealers and have lots of new parts (New Old Stock or NOS), and we have 100+ Bultaco derelicts in the back yard to pick used pieces from as well. We buy inventories, large and small. Call us and tell us briefly what you have. We do Bultaco engine rebuilding, with a five day turnaround on most engines. We have a complete machine shop in house for services such as crankshaft press and align, cylinder boring, heli arc welding. We do left side shift conversions, from start to finish. We are dealers for Sammy Miller products, Amal (carbs and carb parts, throttles and levers), Barnett, Western Power Sports and Tucker Rocky; and we have some parts reproduced. To order you must call Lynn as there are many options to each order which he needs to discuss with you. Many of these 40+ year old bikes have had lots of changes over the years. When you call please have your engine or frame number (so we can determine the correct model number), and if you're talking about a piston or a set of rings, we must have a current BORE size. We may need to know what carburetor you have on the bike. Please see our attached Model Number Reference List for more information. Bultacos were not sold by year; they should only be identified by model number. Because there is much discussion to ordering parts, ordering by email is very limited. You can email some information to us, but the actual order needs to take place by phone.
  3. Re the GL4 / GL5 discussion. I have attached a screenshot of the API (American Petroleum Institute) specifications below (note: active in the spec In blue means the spec is still in force and doesn't refer to the additive levels). After 35 years in the lubricants business, I still smile when I see postings about oils. It's sure to start a discussion. EP90 is primarily an Industrial oil designation and has no relevance to automotive performance standards issued by API such as the GL1 through 6 specs. It's actual interpretation is that the product is an EP treated oil with a viscosity at 40C of between about 125 and 300 cSt (Centistokes). Yes the spec is wide enough to drive a bus through but that's why ISO viscosity grades were invented ;-) GL5 is a higher additive level than GL4 and therefore a lower coefficient of friction. They both contain sulphur phosphorous EP additives but at different levels. Compatibility with yellow metals (brass / bronze etc) is not a problem as these gear oils have not used active sulphur for decades and there is no compatibility issue. Discolouration of yellow metals was an issue many moons ago but not any more. There is a caveat here though, prolonged, very high temperatures will cause some discolouration of yellow metals due primarily to oxidation of the oil. This is not a likely scenario in a Bultaco gear box. Providing the viscosity is high enough to provide a sufficient fluid film between the gear teeth, and we are talking simple spur gears on parallel axes here which rely on an EHD regime (elasto hydro dynamic) and not hypoid / spiral bevel, then automotive specs are a bit redundant as these are simple gearboxes with none of the high sliding velocities found in automotive applications. Industrial Gear Oil specs are probably more relevant. If the higher viscosity would cause operational problems, ie like difficulty shifting gears when cold, then a lower viscosity EP lubricant will be called for and the EP additives will help. Reference to Lubrizol's website will give the same info but in a bit more detail. https://lubrizol.com/Lubricant-and-Fuel-Additives/Driveline-Additives/Axle-Oil/Specifications Upshot.......... SAE 90 GL4 or 5, or SAE 90 or SAE 140 industrial gear oil, you could also use engine oil with a viscosity of > 150 cSt @ 40C (an SAE 40 or 50)......................... your choice. (Puts tin hat on and awaits the onslaught........................) GL-4 Active The designation API GL-4 denotes lubricants intended for axles with spiral bevel gears operating under moderate to severe conditions of speed and load or axles with hypoid (see note)gears operating under moderate speeds and loads. These oils may be used in selected manual transmission and transaxle applications where MT-1 lubricants are unsuitable. The manufacturer's specific lubricant quality recommendations should be followed. GL-5 Active The designation API GL-5 denotes lubricants intended for gears, particularly hypoid (see note) gears, in axles operating under various combinations of high-speed/shock load and low-speed/high-torque conditions.
×
  • Create New...