# 2 stroke **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 5, 2007, 9:21pm UTC](https://community.cartalk.com/t/2-stroke/5527 "2007-10-05T21:21:24Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![TJScott2012](https://avatars.discourse-cdn.com/v4/letter/t/e68b1a/32.png) [@TJScott2012](https://community.cartalk.com/u/TJScott2012)\ **Post date:** [October 5, 2007, 9:21pm UTC](https://community.cartalk.com/t/2-stroke/5527/1 "2007-10-05T21:21:24Z")
is it possible to convert a 4 to a 2 stroke? if so how? ---
**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\ **Post date:** [October 5, 2007, 9:40pm UTC](https://community.cartalk.com/t/2-stroke/5527/2 "2007-10-05T21:40:26Z")
Uh… no. Two different methods of intake and exhaust there. ---
**Author:** ![rocketman](https://avatars.discourse-cdn.com/v4/letter/r/eada6e/32.png) [@rocketman](https://community.cartalk.com/u/rocketman)\ **Post date:** [October 5, 2007, 9:42pm UTC](https://community.cartalk.com/t/2-stroke/5527/3 "2007-10-05T21:42:49Z")
Not even close . . . two different engine makeups. Rocketman ---
**Author:** ![TJScott2012](https://avatars.discourse-cdn.com/v4/letter/t/e68b1a/32.png) [@TJScott2012](https://community.cartalk.com/u/TJScott2012)\ **Post date:** [October 5, 2007, 10:04pm UTC](https://community.cartalk.com/t/2-stroke/5527/4 "2007-10-05T22:04:44Z")
thats what i said, but my cousin keeps telling me that he did it ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [October 5, 2007, 10:30pm UTC](https://community.cartalk.com/t/2-stroke/5527/5 "2007-10-05T22:30:16Z")
I suppose it could be possible by adapting a 2-stroke top end and oil metering system, including the carb/exhaust system, and whatnot but that’s a lot of trouble and expense. It could be done if someone wanted to devote the time to an exercise in engineering and is prepared to put up with working the bugs out. Heck, years ago a guy built a 30s era Harley knucklehead to run on the salt flats. The air cooled engine had been converted to dual carbs and water cooling. I’ve seen pics, and yes it’s ugly as sin. Function over beauty though. ---
**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\ **Post date:** [October 5, 2007, 11:17pm UTC](https://community.cartalk.com/t/2-stroke/5527/6 "2007-10-05T23:17:03Z")
Well you might make a 2 stroke using some parts from a 4 but I would not call it converting it. ---
**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\ **Post date:** [October 6, 2007, 12:33am UTC](https://community.cartalk.com/t/2-stroke/5527/7 "2007-10-06T00:33:39Z")
A lot of 2-stroke bikes don’t even have a central oil metering system. Like ok4450 said, I guess you could use the barrel, head, carb, intake, and exhaust off of a 2-stroke bike on a 4-stroke lower case, but… why, again? ---
**Author:** ![pleasedodgevan](https://avatars.discourse-cdn.com/v4/letter/p/51bf81/32.png) [@pleasedodgevan](https://community.cartalk.com/u/pleasedodgevan)\ **Post date:** [October 6, 2007, 4:40am UTC](https://community.cartalk.com/t/2-stroke/5527/8 "2007-10-06T04:40:53Z")
I’ll bet he did a lot of other things too that nobody can verify. I stopped the cold war by working on military aircraft. The Russians knew that if I was allowed to even get near an airplane that we weren’t serious. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 6, 2007, 5:15am UTC](https://community.cartalk.com/t/2-stroke/5527/9 "2007-10-06T05:15:12Z")
I look at this post! And just sit back and laugh! Tester ---
**Author:** ![JayWB](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@JayWB](https://community.cartalk.com/u/JayWB)\ **Post date:** [October 6, 2007, 5:34am UTC](https://community.cartalk.com/t/2-stroke/5527/10 "2007-10-06T05:34:35Z")
Is your cousin Al Gore? Did he do it right after he invented the Internet? ---
**Author:** ![rocketman](https://avatars.discourse-cdn.com/v4/letter/r/eada6e/32.png) [@rocketman](https://community.cartalk.com/u/rocketman)\ **Post date:** [October 6, 2007, 12:56pm UTC](https://community.cartalk.com/t/2-stroke/5527/11 "2007-10-06T12:56:20Z")
Look for a website about old SAABs . . . their early cars were strokers and you can appreciate how they attempted to develop the two-stroke for automotive purposes, increasing size, oil injection, water cooling . . . but eventually their engineers scrapped the two-stroke design for a four-stroke/four cylinder engine (I believe that they bought Triumph motors for their early 99s, and then built their own later on). If those engineers couldn’t adapt their proven but somewhat inadequate two-stroke design, I don’t believe that it is all that feasible. Having said that . . . someone with enough time, money and the inclination to do so, could build a four stroke out of a two-stroke. Rocketman ---
**Author:** ![JoeMario](https://avatars.discourse-cdn.com/v4/letter/j/3bc359/32.png) [@JoeMario](https://community.cartalk.com/u/JoeMario)\ **Post date:** [October 6, 2007, 12:57pm UTC](https://community.cartalk.com/t/2-stroke/5527/12 "2007-10-06T12:57:15Z")
> I look at this post! And just sit back and laugh! Me too. Converting a 4 to a 2 stroke would only be possible with a very well stocked machine shop and an indepth knowledge for how to use the equipment and for internal combustion engines themselves. Based on the question the OP is asking, I suspect he’s on the other end of the spectrum. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [October 6, 2007, 1:37pm UTC](https://community.cartalk.com/t/2-stroke/5527/13 "2007-10-06T13:37:04Z")
I don’t recall the Triumph engines, but I can tell you that Saab began using an excellent V-4 that they sourced from Ford of Germany, in the late '60s–early '70s. Incidentally the original Saab 2-stroke engine was a 2 cylinder (!) design that was essentially copied from the German DKW automobile. In 1955, they converted to their better-known, 3-cylinder, 2 stroke engine. Although they progressively increased its power output over the years, by the early 70s they realized that the 2-stroke design had reached its design limits. And even with the advent of oil injection for it, the limited number of people who were willing to constantly refill the oil tank as well as the gas tank made it necessary to use a 4-stroke engine–hence the adaptation of that Ford V-4, which was a 4-stroke design. ---
**Author:** ![TJScott2012](https://avatars.discourse-cdn.com/v4/letter/t/e68b1a/32.png) [@TJScott2012](https://community.cartalk.com/u/TJScott2012)\ **Post date:** [October 6, 2007, 1:40pm UTC](https://community.cartalk.com/t/2-stroke/5527/14 "2007-10-06T13:40:33Z")
now hes telling me that he did it the other way around and im telling him thats impossible too, i need some backup here please ---
**Author:** ![rripstop](https://avatars.discourse-cdn.com/v4/letter/r/65b543/32.png) [@rripstop](https://community.cartalk.com/u/rripstop)\ **Post date:** [October 6, 2007, 3:04pm UTC](https://community.cartalk.com/t/2-stroke/5527/15 "2007-10-06T15:04:57Z")
Why do you need backup? He’s lying or he’s clueless, or both. Either way it doesn’t matter. Get a book on engines and show him the difference. 4-stroke induction is through valves. 2-stroke induction is through the crankcase, no valves(with the exception of charged 2-stroke diesels). ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [October 9, 2007, 12:30am UTC](https://community.cartalk.com/t/2-stroke/5527/16 "2007-10-09T00:30:27Z")
When pigs fly… ---
**Author:** ![ki4amd](https://avatars.discourse-cdn.com/v4/letter/k/9fc29f/32.png) [@ki4amd](https://community.cartalk.com/u/ki4amd)\ **Post date:** [October 9, 2007, 12:33am UTC](https://community.cartalk.com/t/2-stroke/5527/17 "2007-10-09T00:33:12Z")
Sure it’s possible, but I think it’d be easier to build one from scratch by machining it out of a fresh block of steel.