dadof2

Ho Ho Ho - very appropriate for a TIME and observation post

It is probably Repsol money paying for the above not Honda money. TY 250R - Arguably the best all round trials bike ever built, cost around £2500. Lots sold. Yamaha then replaced it with the TYZ, price £4600 upwards. sales soon fell, Yamaha effectively pulled out of trials shortly afterwards. Had Yamaha just tweaked the TY it by bit each year avoiding large retooling cost the trials world may now have been a very different place.

The bloke said trail bike in his first post - does he really want an enduro?

Whichever you decide to use stick to one type and thoroughly flush your coolant system with a cleaner approved for use on aluminium before refilling. Traditional antifreeze containing Mono Ethylene Glycol.This Engine Coolant Concentrate to BS 6580-2010. is my preference. There seems to be quite a few cases of clogging / reaction when the red long life antifreeze is used.

Honda used to supply mapping software and leads so you could "tune" your bike using a laptop. There is bound to be several 4rt owners who have this kit. Probably available as an optional extra on new 4rt.

New Honds now available 4RT factory £6799 4RT standard £5699 But the real bargain is the 125 CRF motocrosser with electric start at £1,999 Why then can't they do a useful 250 / 300 cc trials bike for around the £3000 mark?

JR - Have you got that Mont started yet? Do you have the diagnostics software?

Has anyone actually determined if there is a linkage between numbers of riders competing and stop / no stop or is it some factor other than these rules? For example the main reason I and several of my friends quit motocross was having to provide a marshal at every meeting. Clubs started having two marshals at each post and having them do 1/2 a day. Prior to this you only needed about 16 or 20 marshals which meant with in excess of 100 riders you only had to provide a marshal every 5 or 6 meetings. Back to trials, cost and lack of practice areas are major factors putting people off. Its not just the cost of spares, its the feeling many have that many spares prices are a rip off. Disposable income among the young is very low. When I started trials and was an apprentice a new bike was 10 to 15 weeks wages, my bike and van cost about a weeks wages each to insure. Many young are now out of work and even for those in work their disposable income is very low. For many teenagers just running and insuring a car takes all their disposable income. Was no stop a success or a failure? First you have to define success and failure or how will you know which has been achieved?

Do you mean easier to start or lowering the force needed on the kickstart?

Could be an air leak either between carb and engine or direct into engine such as crank seals.

Unfortunately #1 is not correct. Fitting a large gearbox sprocket or smaller rear wheel sprocket may not increase top speed, in many cases it will do the opposite. What it actually does is lower RPM at the maximum speed the bike will reach.

I maybe slightly misused the term clubman, I was not referring to riders who justy ride the easy courses at club trials rather than experts course. I mean the vast majority of riders who pay all their own way, rather than those on works or dealer bikes. I have a few finishers certificates and a few finishes just outside time so I know how tough it is, but if I were only ever to be allowed to ride one trial again I would choose the scott. Lets be frank though, riders arranging to have wheels etc taken out to the course are intending to cheat, no other word for it. This is not just my opinion it is shared by other scott riders I talked to. Regarding being able to drop out of a secion for just a 5. This is just placing more pressure on observers to make a judgement on what is genuine that they could well do without (I have observed at the scott) and observers making difficult judgements has attracted a lot of controversy. Definately some gained an advantage by doing so. JR Sunt - did you have your back tyre a shade hard, you seemed to be struggling for grip at Whaw?

Hi there gizza5 The rules state you must make a bonafide or genuine attempt at the section, not just enter the inn cards. What I saw on Saturday were many attempts that were not genuine. The riders just rode in on the easy flat for a few yards, bumped the front wheel against the first big rock then swung out and rode away. I don't know the final instructions to be given to observers but not that long ago it was a requirement to enter between in cards, traverse the full length of the section and leave between the outs. Observers used to allow occasional breaches when someone was stuck for a long time causing excessive queues by following riders. How come someone just happened to have a spare wheel on the moors for Michael Brown - as acknowledged on John Shirts report? If this sort of thing continues it will make the scott a joke just like drug taking did to the tour de france.

Briefly carburation setting consist of; Clean air filter correctly oiled. float height correct, timing correct, make sure cold start enrichment is shutting fully and bike has correct plug. Mark your throttle twistgrip with marks at 1/4, 1/2, 3/4 throttle opening. You need a good long hill where you can keep the bike pulling steadily at the different throttle openings. Ideally you will be able to maintain the required throttle opening for 2 minutes but 20 seconds will do. Set bike with no tick over, and put clean plug in Run the bike at the throttle opening for the required time then simultaneously close the throttle and pull the clutch in. remove plug and note colour. Medium to dark chocolate brown indicates mixture correct, paler means weaker, darker means richer. 0 to 1/4 throttle is controlled by idle jet and low speed mixture screw. 1/ to 3/4 mixture controlled by needle jet, full throttle controlled by main jet. There is some overlap between jet effects and it varies from bike to bike

He will be the next occupant of a coffin if he keeps pulling onto the track like he did today Absolutely brilliant race, just marred by black flag incident, a bit like when Max Biaggi was blackflagged and it ruined the championship from then on.

Why does an electric fan thermostat for a car that lasts 10 years or 100000 miles cost less than £10 but one for a trials bike that often only lasts a year or two cost £35 plus?

Take the primary drive cover off and count the teeth on the clutch and crank pinion At a guess it will be be around the 5 or 6 to 1 mark with the actual teeth numbers being prime

Never had anything to do with ossets but corrosion in laminated electrical magnets can quickly swell then and seize solid any rotating electrical device or welding sets with moving transformer parts. Brushes can stick firmly to the armature but usually a sharp tap frees this.

Have to say I was very surprised when DL was the winner. I saw him in the latter half of the trial and he fived 2 section where quite a few of riders went clean - I though he was having an off day - now the reason is clear. On a sadder note I also saw the following. Minders carrying spare wheels etc to sections - clearly pre arranged outside mechanical assistance and outside the rules. Had I seen them actually use the wheels I would have taken the riders numbers and reported them. Riders cutting the course, not a lot but significant. in past events I have known of several riders excluded for less than what I saw yesterday. riders not completing the section and only getting a 5 for it. Some riders (including Emma Bristow) made a real effort and expended a lot of time and energy struggling and pushing through sections, whereas some only rode several yards in and then turned out and went on their way with only a five and little loss of time and energy. My feeling is that the trial was probably a bit harder than it should be. I don't say the scott should not be tough but it is primarily a clubmans trial and I would hate to see entry numbers fall. A winner on 55 and very few under 100 suggest it has room to be eased. Far better to ease it a bit and make all riders traverse the full length of all sections than have the sections too hard and then randomly let riders exit at different points.

Not something I have ever concerned myself with. However a bloke who used to build speedway and grasstrack engines back in the days of JAP and Weslake use to have holes in the crank wheels into which he could insert lead, steel, aluminium or plastic stuffers to minimise vibration at different RPM

See my reply #8 on your original post - 2 stroke tuning by Graham Bell Do as web search and read a few different description of plug chop / check. It is covered in the bultaco clymer manuals and honda mx manuals (and many more)

Apparently so, I see they say it is coming soon. Can you post a photo of your stator I have found these 4 faults in the past. 1) the source coils earth was making poor contact with the stator laminated segments where it is held by the fixing screw 2) the wire on the HT coil had necked off unseen inside the insulation near where the connector was crimped on 3) internal coil HT failure 4) internal coil HT failure The HT coils are not just LT and HT winding's, they contain electronics, don't know the present situation but Beta coils used to work OK and were about 1/2 price of Gasgas. I expect your stator will have two coils with windings of heavier wire - these are for the fan The 2 coils with the finer windings are linked and provide the ignition power. Find the wire that comes off them and spin the motor (plug removed) with a battery drill. Should get over 20 volts AC between this wire and earth. It is the internal connections in theses coils that usually fail lowering source coil output.

As a certain British grass track champion once said "you'd be better having a sh-t before the race

Quality aside (and I have no experience of either system mentioned) ask the suppliers for an ignition advance curve graph. Some ignitions have no advance and will give soft / less power. Some have quite a few degrees advance just over tickover and will give much more torque in this RMP range than fixed timing. Some have retarded timing at very low RPM which makes stalling and kickback on starting less likely

cause of leak? Is leg damaged?