Author Topic: A two stroke question? (Read 3716 times)

Deerslayer · « **on:** May 01, 2017, 11:34:38 AM »

I was told that the 72 Suzuki t250 that I'm rebuilding, is better run mixing the gas and oil myself, rather than relying on the oil pump. This is out of my expertise. Anyone care to weight in?. The reason I was told this, is that the pump sometimes pumps to much or not enough oil.

Bob

innovativems · « **Reply #1 on:** May 01, 2017, 02:24:46 PM »

Those oil pumps work pretty damn good

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Steve_K · « **Reply #2 on:** May 01, 2017, 03:25:08 PM »

I know that 70's Kawi oil pumps are adjustable and we would fine tune the pump. Factory settings seemed to oil plugs and were not set to the factory specs. Who knows what has been done to it over the years.
Steve

ekpent · « **Reply #3 on:** May 01, 2017, 04:27:06 PM »

Check that model out very carefully first before considering that. Most Suzuki 2 stroke road bikes use a "posi force lube" system where the oil injection system cannot be removed and run on pre-mix like some Yamaha and Kawasaki's. Pretty sure your model would lose some main bearings in the case if you do that. There should be a procedure in your service manual for adjusting it. If you get excess smoke especially more on one cylinder then the other you probably have a bad crank seal and are sucking transmission oil.

firebane · « **Reply #4 on:** May 01, 2017, 05:22:21 PM »

Use the pump. They work awesome and are very reliable and it was a lot of misinformed people who pulled them or used them strictly for dirt.

The reason a pump is better for is it premixes based off the throttle and gives more or less oil depending on engine demands. Running premix means same mixture no matter what which isn't always the best.

Deerslayer · « **Reply #5 on:** May 02, 2017, 06:48:49 AM »

Thank you for the replys, guys. I'll use the pump. What should I look at in the pump or clean and or rebuild?

Stev-o · « **Reply #6 on:** May 02, 2017, 07:47:49 AM »

+1...Use the pump. Heres an old pic of my TS 250...need to get her out of storage

ekpent · « **Reply #7 on:** May 02, 2017, 08:43:43 AM »

Do you have a service manual yet ? Here is an early one doing a quick search. May be better out there. http://www.saucygoats.net/wp/wp-content/uploads/2013/02/Suzuki-T250manual.pdf

firebane · « **Reply #8 on:** May 02, 2017, 09:41:51 AM »

1981 Yamaha SRDT 175 2 stroke BRAPPPPPPPPPPPPPPPPP

Deerslayer · « **Reply #9 on:** May 02, 2017, 06:05:05 PM »

Ekpent, I have a service manual, but the one you sent is different. I'll use both.

Thank you, Bob

SKTP · « **Reply #10 on:** May 02, 2017, 07:09:33 PM »

How are the front brakes on these bikes?

Deerslayer · « **Reply #11 on:** May 03, 2017, 05:15:55 AM »

Are you asking how good they stop? Or asking to rebuild?

Bob

SKTP · « **Reply #12 on:** May 03, 2017, 10:57:04 AM »

I am asking, in general, are Suzuki t250 front drum brakes considered a good front brake that stops well?

Deerslayer · « **Reply #13 on:** May 04, 2017, 05:48:31 AM »

Unfortunately, this is the first two stroke/ drum brake bike I've own. I thought I'd keep it as original as I could. Doing kind of a budget restore, so using as much of original stuff as I can. This will be a city hopper.

Bob

Deerslayer · « **Reply #14 on:** May 05, 2017, 02:19:21 PM »

I'm into the engine now, boy what a job getting the barrels off. I find out tomorrow if it's a hone or bore. Changing the crank seal, and sonic cleaning the oil pump. I will rebuild the clutch, and check crank bearings. New pistons , pins , c- clips, rings, pin bearings.

Bob

HondaMan · « **Reply #15 on:** May 05, 2017, 06:58:33 PM »

Quote from: Deerslayer on May 05, 2017, 02:19:21 PM

I'm into the engine now, boy what a job getting the barrels off. I find out tomorrow if it's a hone or bore. Changing the crank seal, and sonic cleaning the oil pump. I will rebuild the clutch, and check crank bearings. New pistons , pins , c- clips, rings, pin bearings.

Bob

The T250 used to be a screamer! It was a popular college bike. They do rust up if not run or oiled for the winter, though. I'd suspect you can still get overbore kits.

ekpent · « **Reply #16 on:** May 06, 2017, 07:06:57 PM »

Finally remembered to take a picture of my 1971 T250 waiting in the wings for some attention someday. Learn all you can and become an expert so I can e-mail you all my questions when I tackle this someday !!

HondaMan · « **Reply #17 on:** May 06, 2017, 07:11:18 PM »

When building these, don't confuse the T250 with the X6 250cc "Hustler", which has dual rotary valves as it's primary ID feature if you're not sure. And if you think the T250 is quick, don't challenge the X6 with it...

Stev-o · « **Reply #18 on:** May 06, 2017, 07:17:11 PM »

Quote from: ekpent on May 06, 2017, 07:06:57 PM

Finally remembered to take a picture of my 1971 T250 waiting....

I see a baby Triple there, Eric!

ekpent · « **Reply #19 on:** May 06, 2017, 07:26:45 PM »

Yeah Mark those early year X6 (for six speed) 250's were real screamers. Would like to stumble on a nice one,a scrambler model would be cool. That is the only 400 triple Steve out of the 3 that I own that I have actually driven. I was very impressed !

innovativems · « **Reply #20 on:** May 06, 2017, 07:51:54 PM »

Quote from: ekpent on May 06, 2017, 07:26:45 PM

Yeah Mark those early year X6 (for six speed) 250's were real screamers. Would like to stumble on a nice one,a scrambler model would be cool. That is the only 400 triple Steve out of the 3 that I own that I have actually driven. I was very impressed !

Dang it! You have an s3 too!! I may be jealous. An s3 is on my list

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Stev-o · « **Reply #21 on:** May 07, 2017, 05:54:53 AM »

Quote from: ekpent on May 06, 2017, 07:26:45 PM

Yeah Mark those early year X6 (for six speed) 250's were real screamers. Would like to stumble on a nice one,a scrambler model would be cool.

The X6 Hustler was my first (real) motorcycle, hand-me-down from my brother. Was a great runner.
I have a line on one, waiting to hear back from the seller....

Deerslayer · « **Reply #22 on:** May 09, 2017, 05:48:57 AM »

I checked the cylinders and only needed a hone. Checked with bore gauge, within .001. Good news. Going to replace crank seals, and start reassembly. I did order a electronic ignition from England, comes with coils, wires, alternator. Has a lot more output. No points or condenser. My bike has a six speed tranny too. Haven't got the tins back yet though. Polished up the side cases a little.

Bob

ekpent · « **Reply #23 on:** May 09, 2017, 05:52:29 AM »

Were new rings easy to find ? I am learning that Suzuki coils are kind of weak. If the ignition is left on too long without running they can burn out also. Probably good riddance on those.

Deerslayer · « **Reply #24 on:** May 09, 2017, 01:39:02 PM »

Yes, I bought 2 sets of pistons from Bitzbikes out of England. ( E-BAY ). A lot of rings on eBay also. Partszilla has some. CMS, out of the Netherlands has parts also. Strange as it seems, oversized rings are more numerous than standard.

Bob

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Author Topic: A two stroke question? (Read 3716 times)