13 replies to this topic

[fredro]

hi my beta rev 3 seems to be cutting out wen u give it a fist full. its fine on low revs soon as you give it some pastie it dies an misses any ideas why ?????? weve cleaned out the air filter an carb

[skippy1234]

---

Don't want these Ads? Why not help support TC and sign-up as a Trials Central Supporter

[skippy1234]

sounds like your carb may still have a bit of crap in and being starved of fuel ..... just my pennies worth tho

[naichuff]

My 200 Beta rev 3is doing the same It started to do this after the last section of the trial half way up the hill I thought at the time it was a plug, water or dirt in carb as it misses at higher revs Havent traced the fault yet

[nh014]

_{Experienced similar issues twice last season, on my 03 270 Rev3. Only fix was to completely strip the carb and blow out every orifice, jet, and passage with an aerosol carb cleaner.}

Edited by nh014, 21 March 2012 - 11:52 PM.

[mcman56]

I had a similar event. After cleaning the carb many many times, I found that it was actually the stator. There are some resistance numbers you can check to verify the stator.

[nzralphy]

If you have the std Beta kill switch it could be that ..... they are horrible and don't work well.

[naichuff]

My kill switch is the yamaha type and has been disconnected cleaned the carb out again cleaned the coil connetions new plug re moved the flywheel cleaned inside checked wiring from stator it was rewound a while back but the bike has not been used much Will run it up again tonight

[dan williams]

Have a look at your reeds as well. You may have a damaged one. If they are just slightly open though it's not a problem as they are forced shut by air pressure not the springyness of the material.

Is springyness even a word?

Actually I should add the question does it rev properly when slowly brought up to full throttle?

Edited by Dan Williams, 22 March 2012 - 01:34 PM.

[stork955]

Gday, ifit revs up ok slowly, check your ignition coil secondary resistance -measure between the plug cap and the primary wire. Sometimes corrosion at the cap terminal can cause this issue, or a shot coil.

Cheers,

Stork

[pindie]

I know this may sound simple but it may only be a blocked main jet?

[0007]

---

Don't want these Ads? Why not help support TC and sign-up as a Trials Central Supporter

[0007]

Install a "spark gap tester" and ride the bike, it let's you increase the gap til spark fails and also ride with it installed, you can watch for loss of spark
If you have spark but the engine is not running, then you do not have an ignition issue
Simple

[fredro]

fredro, on 21 March 2012 - 08:15 PM, said:

hi my beta rev 3 seems to be cutting out wen u give it a fist full. its fine on low revs soon as you give it some pastie it dies an misses any ideas why ?????? weve cleaned out the air filter an carb

[fredro]

Hi chhers for all the help it tutned out to be carb trouble was more **** had been dragged through an i moved the needle up a notch seems to be fine now

[naichuff]

My Ht coil no readings on ht side so will spark at idle but not on full load Rode on Sunday no probs