oz thumper

All deliveries to Australasia (except the Repsol Replica) were fitted with a restrictor on the inlet side. Mine was straight from crate and restrictor had only approximately 10mm hole in it. Also try changing the spark plug, mine failed after 20 mins running and caused backfiring and erratic running at higher revs.

Agree with most of the posts, I have had both 05 and 06 models and had no problem.Like Eddie I have idle set very low and occasionally need to just crack the throttle open the tiniest amount when hot. It is fatal however to twist the grip open as you kick, I have seen several riders unaware that they are doing that, I personally always keep finger on the front brake which helps to stop throttle hand moving. Last but not least take the advice of checking with a dealer who has the diagnostic tool, it is possible to have a failure of one of the sensors in the throttle body or the sender unit. Is the fan cutting in and out normally? Be assured that if you are doing everything right there must be a fault somewhere, because unlike a few other fourstrokes they are not hard to start when hot even when they have been upside down. Good Luck

If you have turned the tickover down from the Honda set rpm like several people on this message board seem to have done it may be the spark is slightly weeker at tickover than Honda planned for the engine - this may also lead to a sooty plug. As for your thoughts on filter over oiling wouldn't the high tech fuel injection system on the Honda compensate for this - unless you really choke the filter with oil? I have a couple of old TLR Hondas - I doubt if I look at the plug more than once or twice a year, I dont think I have had to re-gap it yet but admit to replacing the plug every year or so. I have my bike set at 1130rpm idle and plug is as stated a nice dark brown on the center insulator and electrode, even after a lot of slow work. I also have a 250 TLR and plug life is exceptional, I have found the minature plug in the 4RT not so long life. All the initial warnings about not enough power to run the engine at low revs do not seem to be based on reality, I have run mine ultra slow all season, it doesn't stall, spit or have starting problems. As to why the system doesn't compensate for a plugged air cleaner, I am not sure but it doesn't. Still the most fun bike I have had and new Repsol arrived today !! Going to start unpacking. Why the system doesn't compensate for

Hi Lewis, Plugs are usually black around the outer body but should be a medium brown on the center electrode. If you are running the correct plug, check air cleaner is clean, been reported that using the heavy sticky enduro or motocross filter oils can promote a rich mixture due to the small size of the aircleaner. Recommend you use engine oil as per the book. I presume that you are not running any fuel additives, just premium unleaded? I change my plugs every six meetings or so, but my mate has only changed twice all season without any hassles. Our plugs are consistently brown on the center electrode. As for tyres have not tried anything other than standard Mich,s

Will see him at next trial or can track down his home address if you need it.

In respect to 4RT clutch agree completely with Windlestone. Have had mine 6 months and find it fine. The standard length of the m/cyl push rod does mean that the action is very early and some people are not comfortable with that, however is easily fixed if required. I have found the clutch very quick in that it releases early in the lever movement, but smooth in its engagement.

The crankcase breather can also suck if no PCV is fitted. The breather venting into the airbox also draws clean air from there if negative pressure is experienced.

Thanks Bulldog, understand bank angle sensor but still interested to find out if there is a revlimiter built into ignition to prevent engine damage.

Does any one know if the digital ignition has a built in rev limiter? Whilst the auto shutdown feature is useful when the bike is on its side, six seconds jammed flat out is a long time! I recently parked mine upside down at the top of a section whilst I took a trip down to the creek at the bottom that took a lot longer than 6 seconds and it didn't try to shut down at all. ( But does if laid on its side).

Cota 4RT Starting. Same as everyone else, starts effortlessly usually three pushes from cold. During a meeting usually first push even when it has been upside down. As I have my tickover set fairly slow and there is a bit of drag when in gear, I find hot starting more reliable with the throttle just cracked open a very small amount but keeping the throttle dead still. Don't contribute to the various arguments about which is best bike, only know that the couple of 4RTs here have been totally reliable and we reckon the whole package is fantastic.

Hi trialsman, you might want to have a look at the pegs at www.pivotpegz.net the people using them really rave about them.

Did you get the foot rests from a Harley?>?

Tachometer Digital Inductive ABW Tool 70882. Got mine from Supatoolsonline via ebay. $58 Aus plus delivery ( 25 uk) My mate got his through auto shop. We checked against a borrowed expensive unit and calibrated OK. Enjoy the ride Rob.

Sounds about where I believe they should operate at. Will let you know when I get mine delivered. Any one know if a 9tooth sprocket is available yet? Well had my 4Rt for a few trials and can now sort some of the facts from the stories of what they will or won't do. Have set my bike to 1200rpm idle, and it has never stalled or been difficult to start during a trial. Drops to 1150rpm when the fan cuts in. It will tickover for extended periods without a problem, including when on the side stand (contrary to what someone wrote). Have found that using a very small amount of throttle when hot improves the starting and doesn't upset the electrics as long as you keep it absolutely still. Fitted 43t rear from new, left middle and rear exhaust restrictor in place and totally happy with the performance. Really enjoying the ride, they may be slightly lacking in the world indoor series but have all the majority of riders will ever need.

Stu, reference mini bike revs. I don't know if the bike is 2 or 4 stroke. If it is fourstroke with a simple ignition circuit you can get caught out with tacho setting, because some ignitions are straight off the flywheel and therefore fire every revolution rather than only on the firing stroke. TLR is like this and will give double the actual rev reading if tacho is set to fourstroke scale.

Sounds about where I believe they should operate at. Will let you know when I get mine delivered. Our dealer over East has told me that he had slowed his right down similar to his old TLR (around 900rpm) but hasn't measured it. He has had no problems other than when adjusted to ultra slow it was difficult to start if stalled. This was improved by adjusting tickover up a little. Any one know if a 9tooth sprocket is available yet?

Going by the non electric start machines, about 500gms at a guess. Personally would prefer that bit of weight and engine characteristics that suit me. Any body with a current bike measured what they are running at? Munch?

Just offered Allan a ride on a slow moving TLR, then had trouble getting it back! Seriously the tickover issue is that 1800rpm on a trials bike is NOT tickover. The beauty of a slow reliable tickover on a fourstroke is that you can leave the clutch and rear brake alone on slippery downhill stuff, can't do that if the motor is driving.

Thanks Mark, I also have trouble believing the 1800rpm or not enough power story, even my old DOT made the lights glow on tickover! It is possible that those revs are required to power all lights fan etc to their full capacity. Noted on a ride this morning (mates bike) that you can pull the revs right down on the brake and it shows no sign of running out of sparks. So will wait until mine arrives and adjust as you have. Note droping 2 teeth on rear sprocket is the equivalent of 90 revs off tickover, hardly worth the effort.

Using inductive tacho, don't know of any other way unless you can count real fast!!

Have just tried first machine to arrive in W.A and find it hard to ride with slow running set at 1700rpm, am used to TLR that runs reliably at 800rpm. Initial factory setting was 3200!!! What are U.K riders setting machine at?

You guys don't know how lucky you are. I ordered 4RT in Feb and at this stage delivery expected in February. You guys will have next years version by then. Look forward to the frustration of reading how good they are.