Home. ...... The Gas Gas Guru. Technical Information.
Technical Articles
1. How do I bleed stubborn brakes?
2. How do I clean a carbonized exhaust system?
3. What do I do if I drown my bike?
4. How can I make a temporary gasket?
5. What chain should I use?
6. Is it necessary to run race gas?
7. What spark plug should I use?
8. Unleaded Fuel?
9. How can I improve brake fade?
10. What could cause clutch-drag?
11. Should the fan always be on?
12. What could cause plug fouling?
13. What can I do about sticking brakes?
14. How do I do a Keihin conversion?
15. How do I remove goo from my exhaust?
16. Can I buy an oversize piston?
17. What oil ratio for TX50?
18. Why is my plug wet?
19. Altitude jetting for JT25.
20. TX270 Jetting.
21. Shock problem.
22. TXT200 Pre-mix.
23. Fork Bushes.
24. TXT280 Suspension set up.
25. Youth set up.
26. Reed Valve spacers.
27. Piston Clearance.
28. Oil & plug questions.
29. Routine maintenance.
30. Routine maintenance-tools.
31. Low-end-torque tuning.
32. 2001 TXT280 jetting/pipes.
33. Bad brakes.
34. Throttle response.
35. Piston knock.
36. Starting problems.
37. Bad crank.
38. 321 Jetting.
39. Staring problems.
40. Starting problems II.
41. Warped reeds.
42. '96 370 Jetting.
43. Specification sheets.
44. Steering bearings.
45. Shifting problems.
46. Timing.
47. Brake Fade II.
48. Carbon Reeds.
49. '96 JT370 Jetting II.
50. Gas Gas Bogging.
51. Coolant Mix.
52. Dinged Forks.
53. ATF-oil.
54. Pampera stalling.
55. Measuring Pre-mix.
56. Gearbox Swarf.
57. Fork Seals.
58. Depressed Forks.
59. Warped Head?
60. Muffler Packing.
61. Plug Types
62. Removing Electrics.
63. Wheel Bearings.
64. Backfire.
65. Flushing Coolant.
66. Compression Loss.
67. Octane Booster.
68. Main Bearings.
69. Bad Reeds
70. Plastic Paint.
71. Keihin Carbs.
72. TX50 Altitude Jetting.
73. Kickstart Gears.
74. Bad Coil?
75. Clutch Nut Torque.
76. Dot-5 Brake Fluid.
77. Engine-knock.
78. Fork Oil Filling.
79. Octane Booster.
80. Fan Problem.
81. Spoke Tightening.
82. Keihin PWK Question.
83. Motoplat ignitions.
84. Anti-freeze leak.
TXT2001 PARTS BOOK
2003 Parts Book, Chassis. PDF.
2003 Parts Book, Engine. PDF.
2004 Parts Book. PDF.
2004 Service Manual. PDF.
2005 Parts Book. PDF.
Professional tuner and 'Trials Competition' writer Jon Stoodley has very kindly stepped up to the plate to answer your questions. If you're having problems, or need some advice just send an email to Jon. If it's something that could be useful to others, we'll post it on the site.
Jim Snell of TrialsPartsUSA (Rising Sun Imports) has provided a wealth of information for this site. Many Trials bike owners find it difficult to find 'definitive' information on what's good and bad for their machines. Jim has given us the official Gas Gas recomendations.
SPECIAL ARTICLES
TRIALS SUSPENSION TUNING - Jon Stoodley
TIRE CHANGING TIPS - Jon Stoodley
GAS GAS DEL 'ORTO FLOATS - Jim Snell
JIM SNELL'S JETTING GUIDELINES
JETTING GUIDELINES FOR MACHINES FROM 1992-2002 - Jim Snell
TXT70 Carburettor setup - Jim Snell (PDF Document)
WIRING DIAGRAMS
Motoplat. '90-'94, All Trials Models.
Ducati. '94 JT25, all '95's, most '96's, some '97's. Some Pampera's '96-'98.
Kokusan. '96-2000 Models.
Kokusan. 2000 TXT50.
Kokusan. 2001 TXT models.
Kokusan 2001 TXT80 (Avail as TXT50 in Europe)
Kokusan 2002 TXT-Pro 250/280 Models
Ducati Electronic Ignition - Pro Models 2003/2004
Gas Gas TXT Pro Diagrams
Pro Clutch measurements
Gas Gas Recomendations
Spark Plug NGKBP5RES, Champion RN11YC, Bosch Platinum WR9DP
Trans/Clutch Oil Always 5W30 (Not 10W40), 350cc for the Pro, 650cc for other models, normal motor oil (Castrol/Penzoil etc). It is not recommended to use synthetic oil.
Gasoline 95 Octane minimum. No alcohol type blends. (Jim uses Sunoco purple 115 octane 20% to Shell unleaded premium 80%).
Premix Between 80:1 and 100:1
Brake Fluid DOT 4 is standard. DOT 5 is fine. (All higher numbers mix with lower numbers).
It's sometimes difficult to get the right advice when it comes to bike set up and maintenance. We will endeavor to keep adding more content to this section . If there are any subjects you would particularly like to see covered, please email us.
Home. ..... The Gas Gas Guru. Technical Information.