Posts
435
Joined
12/17/2012
Location
Lisbon, OH, USA
Edited Date/Time
1/19/2013 2:42pm
Hey guys, anyone up for some riding tips?
Differences between 2 strokes and 4 strokes
Ever since sometime in the early 80s two strokes have put to good use the development of a power valve in the exhaust port. This power valve has smoothed out the hit of the two stroke’s power band a great deal. But in order to get a lot of horsepower out of that two stoke engine they still have a certain amount of hit to the power band. This is the biggest difference between the two and four stroke. The four stroke is just smooth tractor like power right off idle all the way upstairs. This is why the four strokes depend less on the clutch and more on throttle control. You don’t have to help it into the power with the clutch nearly as much as with the two strokes.
The other difference is with engine braking. When you’re going down a straight away and you shut off the throttle on a two stroke the back pressure from the engine will slow you down a little, but on the four stroke this engine braking is much stronger. This will make the Exit Dex of a corner (where you go from braking to accelerating) easier. You don’t have to be quite as precise with the brakes. This engine braking effect will affect you on jumps too because if you roll the throttle off on the take off of a jump it will throw the front end down much more on a four stroke. This won’t be as noticeable if you’re in a higher gear.
Since you don’t have to be as precise with the clutch and throttle and the brakes on a 4 stroke they are easier to ride.
At this point in time that’s the main differences between the 2 and 4 strokers. The actually riding techniques are the same. The way I see it it’s all good.
All the details for the clutch, throttle and shifting techniques are shown in this DVD; https://gsmxs.com/shop/motocross-clutch-throttle-shifting-techniques/
Differences between 2 strokes and 4 strokes
Ever since sometime in the early 80s two strokes have put to good use the development of a power valve in the exhaust port. This power valve has smoothed out the hit of the two stroke’s power band a great deal. But in order to get a lot of horsepower out of that two stoke engine they still have a certain amount of hit to the power band. This is the biggest difference between the two and four stroke. The four stroke is just smooth tractor like power right off idle all the way upstairs. This is why the four strokes depend less on the clutch and more on throttle control. You don’t have to help it into the power with the clutch nearly as much as with the two strokes.
The other difference is with engine braking. When you’re going down a straight away and you shut off the throttle on a two stroke the back pressure from the engine will slow you down a little, but on the four stroke this engine braking is much stronger. This will make the Exit Dex of a corner (where you go from braking to accelerating) easier. You don’t have to be quite as precise with the brakes. This engine braking effect will affect you on jumps too because if you roll the throttle off on the take off of a jump it will throw the front end down much more on a four stroke. This won’t be as noticeable if you’re in a higher gear.
Since you don’t have to be as precise with the clutch and throttle and the brakes on a 4 stroke they are easier to ride.
At this point in time that’s the main differences between the 2 and 4 strokers. The actually riding techniques are the same. The way I see it it’s all good.
All the details for the clutch, throttle and shifting techniques are shown in this DVD; https://gsmxs.com/shop/motocross-clutch-throttle-shifting-techniques/
Got any good bobbym stories?
If I were to do it again I would have gone to several of Gary's classes when i was younger and only invested in better safety equipment.
BTW I'm not trying to spam Gary's Schools but just giving you in my opinion the best advice I could to anyone who lines up on a gate.
The Shop
Free shipping: VITALMX
Luxon 4-Post Bar Mounts
$189.95 - $239.95
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
http://www.vitalmx.com/forums/Moto-Related,20/BobbyM,1233022?exclusive_forum_user=true&page=3
After the race he sent his assistant over to find out why I didn't give in. I explained why should I as I'm a privateer with bikes and parts from the German Importer. I found out later he was going to force the importer to pull my support. He didn't know DeCoster was already working a plan to get me on a factory bike. Roger made it happen a few rounds later putting me on the 1981 factory bike with tons of new parts. But there was an arrangement that if a factory rider was trying to pass I would have to let them by. But I didn't have to slow up and let them catch me. I agreed and it all worked out pretty well. I ended up 7th in the series that year (1982).
Pit Row
I'll let you know when I've mastered the whip.I'm only 47 so it shouldn't take too long......
your schools helped me get somewhere with moto i never thought i was able. i did every school that came to Utah, and eventually became friends with Larry Morton and even did some demo work for his riding school when he branched away from the Semics Schools. just wanted to poke my head in your thread and tell you personally, thank you for putting together such a great school and great videos. i wore out my VHS cassettes. - Garet
Maybe that is why MA800 can't get help from Suzuki..
Here's a photo of me on the works bike with Andrea Vormans in tow.
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