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I think the advantages of a 19 rear are that the tyre sidewalls are not as tall and hence have less flex which should help with hard cornering. They may even be a bit lighter then the 18 inch equivalent (less rubber)and hence have a bit less rotating mass. I cant tell the difference between the rear on the CRF450r vs 300EXC. But I couldn’t ride the wheels off a pw50.
Cheers Axel. No running on or hanging. I have idle set pretty low. Snapping throttle, revs respond without hesitation or bogging and revs drop back to a steady low idle in what I believe is a reasonably quick time. No running on after shutting throttle coming into corners etc. Plug was dark oily but no carbon on tip etc. Bike fouled the week before as well but I put this down to running Silkolene Kr2 as I was at the farm with the kids (riding slow and idling more than usual) and ran out of my fully synthetic Klotz R-50. Again plug was oily but no carbon/crusty bits. Bike hasn’t need coolant top up except for this weekend at North Star but I put that down to boiling the bike in the rocky forest. Proper boiled with steam in my face and coolant pissing on my boot. 2 Other riders on 300’noted I was running a bit smokey. Not a lot but usually once these things heat up you only see the occasional puff. Reed petals are an easy fix, Scotch brite the head as best I can. New top end kit. Would a dyno tune highlight any air leaks or other probs? Outside this, ebay no reserve or the tip as my wife has mentioned.
Cheers Dude. I have been watching a few of your youtube vids and it looks like you are getting along very well with the 300.
The needle is not marked so I assume it is stock. I will put the Suzuki needle in that I read people are doing. Pop it back together then on the dyno and let those in the know sort it out.
Cheers Ted. I had considered that. Do you think the running for 5 min or so with the broken reed could have created a lean condition? I didn’t notice any detonation prior to the reed failing. From what I have read detonation is pretty noticeable when the bike is under load etc sounds like the motor is full of marbles.
The spark plug is white as it is new. When I got back to the pits it was the first thing I replace in attempt to get going again.
I think I will just tidy up the head. New piston kit and gaskets etc. Reed petal kit then send it of to SSS to have a look at my jetting. 38pj 165main and needle on 2nd clip.Hey Ollie. I didn’t take note of the coolant level before I dropped it. I did boil the bike in one section of North Star due to clutch flogging. Didn’t do any water crossings. Fresh fuel mixed at 40:1
I dropped the gear oil and it looks pretty ordinary. Dark with a silver look. But not the foamy white substance on the inside of the power valve cover. I recon you are right though. At some point coolant has mixed with gear oil and been flung about up into the power valve. I am trying to avoid a full bottom end rebuild so my main concern is the pitting of the cylinder head. A perfect scenario would be that the pitting was caused by the reed valve and those broken bits have since been forced out the exhaust port. That being said I would hate to pop a new top end in only to find that something did go off in the bottom end and I stuff a new piston. Thats the $299 vs $1059 question.Sorry, photos are not uploading for some reason.
I like it. I like it alot.
Hey Mate
The below link should take you to a manual for your model. Fingers crossed. That should help with jetting options and pv setting.
http://moto.tt.free.fr/explorer/KTM_Manual_engine_250_380_1999_2003_english.pdf
I imagine turning the preload out flush with the case will be a good starting point. Try it and see how the bike reacts.
Fuel filter. I don’t run one but cant see how 2% premix in the total fuel volume will affect the filters performance. Give it a go.
Are you happy with the bikes performance? If so, jetting should be ok, but its pretty easy to remove the jets and needle to at least know what you are running. Fresh plug and silencer packing. Then just get it angry and have some fun.
I use these on both the front and rear. Very happy with the performance. The rear is great under breaking and very good acceleration. I haven’t been left wanting with the front tyre grip. Riding at Nundle and Attunga so the conditions cover pretty much all. Mud, loam, red clay, rocks, hard pack and fire trail. The rear clears itself really well of mud which is good. The nobs on the rear have started to get a slight rounded edge after 150km or so which I am happy with. Most of this would be from the hard Granite rocks at Attunga. Edge nobs hold up well and only started to tear off the prior set when the tyres was well and truly past their prime. In my opinion, a great tyre year round for a range of conditions. There will always be a better tyre for a specific type of condition but the AT81 works for me. Cost $250 a pair fitted. Prior to these I used Pirelli Scorpion Extra X which I believe lasted longer but didn’t grip as well. Still a good tyre though.
Well anything is possible with the right tools. Got it out in under a minute. Cheers guys and Boze for the lend of your easyout.
Yep Axel, there is not much I can’t stuff up. The bolt looks pretty shagged. I doubt it was the original bolt as its not the typical torx head bolt you see on ktms. The seat was going on and coming off a fair bit when the bike was fouling plugs so maybe something happened then to weaken it. Perhaps my frustration made me over do it last time.
I have got a lend of an Easyout so with try to drill the bolt and give that a go. CheersI see nothing but a well executed pivot turn. Congrats on the new bike. Looks the goods. Can’t wait to see it in action. Cheers
Well bugger me Boony. I was looking forward to riding with you again. Not really, but I feel I should say something like that. But aside from the shits and giggles we hope for a quick recovery and to see you back soon.
I am happy to take the 350 and keep the cobwebs of that rev limiter. CheersSorry Ted.
House painting and looking after the little one on Sunday. Enjoy the ride and will catch up on another one soon. CheersAnd that’s enough from you Boony. Just remember, I have the ability to run up the back of lead riders every now and then. https://www.youtube.com/watch?v=vPwSXq5WeuI at around the 10.30 min mark
Cheers
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