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OK, have done some research. The heat range is determined by the length of the insulator protruding around the electrode. The shorter it is the less insulation and therefore the hotter the spark is. This will lead to pre-detonation if used in the wrong situation. Too cold will lead to fouled plugs.
Iridium plugs use iridium for the electrode. It can be made thinner than a conventional material and also have a squarer edge to improve the ability to make a good spark for longer.
The numbering system varies from manufacturer to manufacturer. It reflects the heat range of the plug.Yep its the heat range and using the wrong one can lead to destroyed pistons in 2 stroke engines. No doubt it does damage to 4 strokes as well.
Iridium plugs I can’t answer on, other than they last no longer in my sons KX65 than a standard one.We have a CRF50. Second son is now about to out grow it and the third one is nearly ready to start learning on it. Great little bike for kids to learn on, some kids will outgrow them faster than others though.
The peewee has more aggressive power if there is such a thing in a 50cc bike lol. A million kids have learnt to ride on them as well.
The only bit I don’t like on the CRF is the stupid air filter which is nearly impossible to get of and on.
The CRF does 60 kmh too which is handy here when we go down the road on our farm. bit scary too though lol.
Perhaps I should ride the CRF50 in the scrapheap challenge :woohoo:I havnt had a valve stem pull out since I gave Cheng Shin tubes away in my farm bikes 20 years ago lol. Still have a draw full of valve stem nuts from them lol.
I am not too brand loyal but I might give the Michelin ones a go by the sound of them.
I did ride a full lap at Uralla pony express a couple of years ago with a flat front on my old CRF. Put few big dents in the rim but I could not find the hole in the tube! Thats 20 odd km’s over a really rock strewn track. Couldn’t tell you what brand it was now though.I use a bucket and put a raised bottom in it made from an old truck air filter(the perforated steel outer bit). That way you don’t need to keep pouring the turps back into a bottle. The dirt just settles to the bottom of the bucket leaving the turps clean for next time. The bucket has a lid to stop the turps evaporating. Finding a bucket that the turps won’t eat its way through is the hard bit.
Don’t use petrol as it deteriorates the foam. Turps seems to work well followed by a good wash in soapy water and then rinse it.
Use a quality filter oil because it is tacky compared to engine oil and won’t just drip into your air box leaving your filter dry.
Dont scrimp on filter cleaning as it may well stretch your modern 4 stroke life to at least 3 or 4 years before a big end bearing etc flies to pieces rather than a worn bore from a dirty filter…..Thanks for the quick replies! Yeah the handle bar switch is blank where the indicator switch normally would be. local blue slip man is pretty good but will do some research first to save on the pain in the arse factor lol.
October 10, 2012 at 9:57 am in reply to: 2013 Scrapheap Adventure Ride – Back ‘O’ Bourke – March 29-30 #230609Hmm. Might have to give this some thought and do some work on the old girl.
October 10, 2012 at 9:36 am in reply to: 2013 Scrapheap Adventure Ride – Back ‘O’ Bourke – March 29-30 #230604So what is the go with this ride? Do you have to start at Sydney or can you join in along the way? I have a 73 SL175 that a mate gave me, which I could use. Sounds like a fun ride.
40 minute laps will mean you should really use a camel back as well. One great sign of dehydration is loss of concentration. Loss of concentration equals crashes.
Pace yourself, consistent riding will give you the best results. Falling off is the slowest way to do a pony express.Yep they can all be crap. My 08 CRF450X lunched its big end bearing, needed a set of valves and I had to replace all the gearbox bearings after I holed the case(not the bikes fault this time).
it was the most expensive to run bike I have ever owned. Was one of the best I ever rode too though….
However, my new Husaberg FE450 is just the dogs bollocks! Easy to ride fast or slow, best suspension, innovative, just a sweet bike. Its hopefully a keeper for life. Just love it. Seems to be terrific dealer support as well. Only trouble is they have sold out too far to the pumpkin brand with their 2013 models.Wow, seems that Honda did actually have a replacement for the XR250 after all lol. Just took about 5 years for everyone to notice they were there.
They must be good little bikes judging by the number buying them on here. Maybe Honda just needed to pay all the bike mags to say how good they were like Yamaha must do? Then they would have kept their market share. Which brings me to this question, why in the last couple of issues of ADB they tested “all” the 250 and 450 bikes but there were no Honda bikes included?
Yamaha WR450 is just another clunker with a carby, and yet the mags were full of stories on how awesome they are. They are clearly just a parts bin special with no new technology. Honda CRF’s are the same and they don’t even get into the magazines for test articles……… go figure.A car your kids drive to the bus stop on a farm.
Ah wish it was manual. I am looking for a bus stop car. needs to be manual though.
Ah that sux! I would recommend replacing gearbox bearings after that. Metal particles got in between the cases and bearings on my CRF and you will never get it out without pulling the bearings out.
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