alfow1

Ok thanks tshock 250 that makes perfect sense, getting confused with a four stroke.... Which plug are people using in their TXR's please?

Update: So i've had to get rid of the airbox altogether as the rubber hose was knackered beyond repair and getting a replacement seems as likely as winning the lottery. I have replaced it with a K&N type cone filter tucked up under the seat. Been back to her a few times now and started with relative ease, after speaking to Peter Knight he reccomended running on 50:1 so changed that. No longer lets fuel out of the crankcase scavenge valve so that's got to be good. Can anyone advise on how many turns out the airscrew on the carb should be? I've been told 1 1/4 but this seems a bit rich, don't want to seize her either! Any advice please??

Possibly getting to the bottom of this now? I took the sump guard off earlier to replace some of the mounting bolts and noticed the end of a nipple showing on the underside, kicked the bike over a few times to start and a good bit of fuel jetted out of it. I'm assuming this nipple is part of an overflow to stop the crankcase flooding? With the nipple being blocked, the crank case couldn't drain itself, leading to the plug being flooded what seemed like a bit too easily. Any thoughts on this? Got her running quite nicley now, although when warm she does take a while to return to idle and sometimes carry's on ticking over quite quickly. Fine when cold and the tickover is not only slower but is smoother too. Any thoughts please?

SHE'S ALIVE! Went back to it with a slightly less painful foot and less frustration, kick kick kick - nothing. Scratched head. Took out the plug and heated it up, kick kick splutter. Took out plug, reheated, kick kick kick and off she went for 30 seconds. I switched off put tank back on. Kick kick kick - nothing and so on for another 10 minutes. Off to the garage for a gallon of Shell V Power (any opinions?) mixed 80:1 with fully synthetic. Drained tank, carb and cleared crankcase using the trusty old method. Thought i'd try another new plug just incase. Heated plug, kick kick kick lowe and behold she fired, ran and continued to run, back on with the tank and off down the road in disbelief. I let her cool down for a good half hour and tried again, first kick and she went. I've now adjusted the mixture to somewhere handy, she revs cleanly and ticks over fine, a little slow to come back down to idle but apart from that pretty good. I think a service kit for the carb may be in order. The clutch slips a little under quite heavy load, is there any adjustment on these or are new plates required? Also what plugs are you good people using in your Aprilia's? So is this a freak occurence or will she start from cold tomorrow? Find out in the next exciting episode of "F*&^%ing 2 strokes, I thought i'd seen the last of them!"

Not mad, well ok maybe a bit. Just thorough, controlled domestic motorbike related explosions are a speciality! Going to go back to it today and double check that the flywheel hasn't slipped, then speak to Peter knight tomorrow and order some points and condenser - would an iffy condenser cause the spark to weaken or break down under compression? I will post results, if you hear a boom coming from the wiltshire direction you'll know it has all gone wrong.

Thankyou for all your input so far. Yes the crankcase was quite badly flooded so we took the plug out, got the piston to bottom dead then hoisted the bike in the air upside down. A fair bit of fuel came out, we then lowered it down and put a lighter to the plug hole to burn the last of it away. We've had the right cover off to check points are opening properly etc, the rotor was fine. What are the chances of the spark dying whilst under compression? It seems like that's all it can be when it's getting fuel and air. Didn't want to start messing with the timing as I have heard it run fine. Wouldn't be half as frustrating if I had bought it as a non runner! What are all your techniques for starting your bike? The previous owner told me no choke which immediatley told me it was running very rich. Also what are peoples mixture screw settings? I'd love to get this running as it's a cracking little bike.

Apologies for getting carried away in desperation and posting my Aprilia woes before introducing myself. Learnt to ride on a TY80 20 years ago and wanted another trials ever since so off I go to buy an Aprilia TXR311 for what seemed a good price. Guess what? it has already proved to be the most frustrating bike I have ever owned and I have had a few. Very pleased to find this site and forum and just hope people more knowledgeable than me are willing to help! Cheers,

Hi all, I'm new to this forum and god am I glad to have found it! Last week I bought an Aprilia TXR311 air cooled. Nice tidy bike, bought it for a good price as a "reluctant starter" Saw it running and rode it on the day, apart from the clutch slipping a little and being a bit rich all was well. Got it home and set about kicking it over with no joy, went through all the obvious checks, it has a very good spark, so much compresion I can put all my weight on the kickstart, fresh fuel, and after taking out the dirty partially collapsed filter it's getting air. In my book it should run, even if it's rough and needing tuning. 4 hours of kicking, towing behind a car, changing the plug, plug gap, full choke half choke no choke, all throttle settings, stripped the carb to check the jets and float. All we had in that time was 2 hints of firing! Frustrating to say the least. Can anybody give any advice on this please, i'm quite useful with bikes and my brother is a good mechanic. We're quite sure we've checked and tried just about everything. Does anybody know what the the carb settings should be? I know each bike will differ but even a benchmark to work from would be good. Please help me! If I sound desperate it's because I am Thanks