Four-Stroke

My wife has a GG 200Pro, and loves the thing. However, she has one real problem with it. And she'd KILL me if she knew I was divulging her secret here. But I'm gonna anyway. The problem is her short, girly legs don't have the strength to start the stupid thing, especially when cold. She was fine with her old '96JTR 270, but with the smaller bore 175cc there is a marked increase in compression it seems. Couple that with a shorter kickstart lever AND shorter distance that lever travels, well, I am often pressed into service to press that lever into service. This annoys, frustrates, embarasses and humiliates her no end. She's done a stretch of leg strengthening exercise…

Have followed this whole four stroke debate with interest but one thing puzzles me, why do 4 stroke engines run at a higher temperature than a 2 stroke when they are supposedly better lubricated and have only 1/2 the number of power strokes. Also why are they noisier than a 2t.

will they be up tomorrow as it breaks cover at the munich show

Hello, afther a 2017 Beta 250 factory 2 stroke i bought a 2017 montesa repsol 260 becouse i love the look off the bike. Yesterday first day at the montesa and i must say it was hard to ride. I will give it a while but when changing back to my beta 250 it felt super light and super responsive. Zapping over a log, turning, hopping,....have to learn all on the montsa or....stay with the beta. Greathings, Luc

Most of the top world riders were in Spain for last weekends Spanish National in preparation for the upcoming worlds I noticed that there were seven factory riders on 4 strokes in the top 11 and only four riders on 2 strokes.

I am of course completely biased, but would it be an idea to have a class for trial competitions limted to four-stroke engined bikes built before 1990? That would make the RTL honda shine once more, and would allow twinshock as well as monoshock bikes to compete in this class...

Did the FIM drop the four strokes only ruling indefinatley? Is it in affect in other countries? I think I read no two strokes can compete in Japan .

I was wondering what the diameter of the front pipes are on the different 4 strokers, My new 08 scorpa 250fr is about 40mm

I have heard all the stories that modern unleaded fuel goes off and has a very short shelf life - I was a ltlle scheptical but now I know its true. Took my trusty old TLR to a trial yesterday along with a tin of petrol from the shed - suspect the fuel in the tank was same age - no more than 4 weeks old. Normaly I give the bike a run the day before just to check all is well but this time was a last minute effort. Loads bike on trailer and off I goes, usually i top up with fuel on the way - dont bother since running late. Starts bike on choke - sounds bit rough - unusual for this bike, its normally trouble free and was perf4ect the last time I used it. lots of smoke…

i guess they can fit the graffix and release the first batch now

Hi, My parents bought me a JCM trails bike for christmas, but i am struggling to work out what the order of the gears are; are they all down? or one down and four up? Any ideas would be grateful Happy Christmas

the other day i went out a spin on my bike im only a learner - anyway a went straight into a ditch an came off it when a looked at the bike there was little oil coming out the gearbox, could this be a crack in the seal or something?

Hi Chaps, I have a twin shock Bultaco 199b that I have totally restored, my son and I have practiced on it most days (lack of work) and a lot of enthusiasm as we are new to this world. From the start, my son is very good so I thought I would upgrade to a newer bike. I would love a four stroke, can you guys give me advice? Will this work for my son and me to have fun on? And maybe for him to compete on? Also can you tell me the pros and cons? Many thanks. Martin

Ishy, this would be a good one for you to answer. You still have yours right? Always wanted one, but wonder what they would be like to ride. A guy as old as me could even drop down and ride in the senior class with one of those thumpers!

Where is the engine serial number located on a Honda TL 125 made around 1980? Thanks

does anyone know much about these bikes as ive just brought one are spares available im going to twin shock convert the bike but leave the mono shock on as well as im a fat ******* ive ordered a 9 tooth front sprocket for a tlr 250 twin shock hope it fits !! any advise would be nice also any idea where i mite get spares from when i need them

Hi have a JDM Honda TLR250R engine which has been fitted to a special frame. As you know this engine was a Japanese only model so information & spares can be hard to get hold off. Can anyone on the forum help in getting information about this particular engine, engine diagrams, part sheets, wiring diagrams etc?. A source of spares, address/Tel number/ email would be also be most welcome.

http://www.honda.co.jp/HDTV/HRC/WCT-race2004-rd03/

I have writen about this allready on another page RE500s hot start mod on the sherco 320 4t has absolutly transformed the hot start issues with my bike for no apparent reason my bike would refuse to start ,sometimes taking 20+ kicks now i still try and start as normal but you can tell if it is having a funny 5 mins lift the hot start open the throttle a little and one kick to clear next kick starts i have even turned it upside down when really hot let the motor stall and it still starts if you have not done it do it NOW

Some people are certain that the new four strokes are going to be a great addition to our sport. Some people are sure that it will mean the end of the world. Some people are wondering about the advantages that the four stoke will offer the trials rider. While it is true that we won't know for certain how they will perform until they get here, I found this description of four stroke power, written by Cycle World's Technical Editor Kevin Cameron, very interesting. "The major advantage of the four stroke is that its power, as the throttle is initially opened, begins near zero and increases smoothly, especially in mildly tuned engines with short cam timing. In the two stro…