trialsteve Posted March 17, 2009 Report Share Posted March 17, 2009 I have just bought a 2000 Beta rev 3 (actually paid for a 2001 but have since learnt it's a 2000) I'm having a little bother, firstly the fan aint working, secondly since putting fresh fuel in it it's running like a bag of sh**! Is there a common fault with the fan? What fuel should I use, what ratio,and what oil should I use? Should I use ATF in the gearbox? Will be grateful for any help Quote Link to comment Share on other sites More sharing options...
kevc Posted March 17, 2009 Report Share Posted March 17, 2009 Hi, I have the same bike and the fan takes ages to come on, I use ATF in mine and it seems fine, send me a message with your e mail on and I;ll send you the info I have. Quote Link to comment Share on other sites More sharing options...
dan williams Posted March 18, 2009 Report Share Posted March 18, 2009 With engine running, short the thermostat switch. Fan should come on. If not a new fan is probably in order. 70:1 - 100:1 common oil ratio with good synthetic. Racing fuel is best because the bike won't tolerate marginal pump fuel at all well. ATF in a Beta tranny makes the clutch very abrupt. I prefer any of the good synthetic gear oils like Spectro Golden Gear or Honda HP. Quote Link to comment Share on other sites More sharing options...
copemech Posted March 18, 2009 Report Share Posted March 18, 2009 With engine running, short the thermostat switch. Fan should come on. If not a new fan is probably in order.70:1 - 100:1 common oil ratio with good synthetic. Racing fuel is best because the bike won't tolerate marginal pump fuel at all well. ATF in a Beta tranny makes the clutch very abrupt. I prefer any of the good synthetic gear oils like Spectro Golden Gear or Honda HP. Dan is correct in "jumping" the thermo switch, but don't run out and but a fan motor quite yet. Test the motor with 12V applied to the fan leads directly. If it runs, you could have a rectifier or regulator problem, less costly than a fan motor! Just FYI! Quote Link to comment Share on other sites More sharing options...
dan williams Posted March 18, 2009 Report Share Posted March 18, 2009 Point taken. Just as a side note it takes about 6 amps to start the fan motor so if you try to spin it up it takes a beefy supply. Quote Link to comment Share on other sites More sharing options...
trialsteve Posted March 18, 2009 Author Report Share Posted March 18, 2009 Hi there, email allrightlad79@hotmail.com. What fuel do you use? Quote Link to comment Share on other sites More sharing options...
trialsteve Posted March 18, 2009 Author Report Share Posted March 18, 2009 Many thanks I'll give it a go. I have found that the bike starts fine and runs perfect low down,but it starts to miss and lose power at about half throttle. Could this be caused by unleaded fuel? Quote Link to comment Share on other sites More sharing options...
dan williams Posted March 19, 2009 Report Share Posted March 19, 2009 Beta's like high grade fuel but if it runs good down low and sputters on top the it's probably time to pull the carb for a good cleaning. Complete disassemble and blow out with compressed air. Also might be time to repack the silencer. Quote Link to comment Share on other sites More sharing options...
trialsteve Posted March 19, 2009 Author Report Share Posted March 19, 2009 I'll give it a go friend Quote Link to comment Share on other sites More sharing options...
trialsteve Posted March 19, 2009 Author Report Share Posted March 19, 2009 Hi there, email allrightlad79@hotmail.com. What fuel do you use? Quote Link to comment Share on other sites More sharing options...
totalshell Posted March 19, 2009 Report Share Posted March 19, 2009 use any 'branded' super unleaded. buy from the busiest garages so that the stock is fairly fresh. with pFS tanks holding 20k litres super can sit about a bit so hunt out a supermarket for best price and newest fuel. as for decoking cant rate a new mid box highly enough replaced mine and the thing was instantly better.. ( thanks to andy at Pennine trialsport for the advice and bits..) Quote Link to comment Share on other sites More sharing options...
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