2T vs. 4T - care and feeding

TVB · Post by **TVB** » Tue Jun 17, 2014 10:47 pm

I will shortly be trading in my long-serving 2T Buddy 50 for a new 4T Buddy 125. Aside from obvious things like giving it periodic oil changes instead of feeding it oil to burn, and laying off the throttle a bit lest I actually break a speed limit

... what should I do differently with this one?

I've read comments about letting the engine idle longer after starting, to give it time to get the oil moving. Is there anything else a two-stroker needs to do differently to treat a four-stroke right?

az_slynch · Post by **az_slynch** » Tue Jun 17, 2014 11:05 pm

The 4T engine should have its valve lash checked at the 500-mile service and then at manufacturer's service intervals. They rarely seem to get out of whack, but valves will stretch a little over time.

TVB · Post by **TVB** » Wed Jun 18, 2014 1:57 am

I'm probably gonna have to have my "500 mile" service done before that, since I'm heading off on a 1200-mile ride in a month, and I only ride about 100 miles in a typical week.

KrispyKreme · Post by **KrispyKreme** » Wed Jun 18, 2014 2:02 am

az_slynch wrote:The 4T engine should have its valve lash checked at the 500-mile service and then at manufacturer's service intervals. They rarely seem to get out of whack, but valves will stretch a little over time.

The exhaust valve gets tight.

scootERIK · Post by **scootERIK** » Wed Jun 18, 2014 2:19 am

KrispyKreme wrote:
az_slynch wrote:The 4T engine should have its valve lash checked at the 500-mile service and then at manufacturer's service intervals. They rarely seem to get out of whack, but valves will stretch a little over time.
The exhaust valve gets tight.

I have to open the exhaust value up every 4,000-8,000 miles. You can hear it, the motor gets a rattle.

KrispyKreme · Post by **KrispyKreme** » Wed Jun 18, 2014 2:55 am

scootERIK wrote:
KrispyKreme wrote:
az_slynch wrote:The 4T engine should have its valve lash checked at the 500-mile service and then at manufacturer's service intervals. They rarely seem to get out of whack, but valves will stretch a little over time.
The exhaust valve gets tight.
I have to open the exhaust value up every 4,000-8,000 miles. You can hear it, the motor gets a rattle.

Better a tad loose than tight.

Neurotic-Hapi-Snak · Post by **Neurotic-Hapi-Snak** » Wed Jun 18, 2014 4:36 am

Why not a 170i?

On a 4T, blue smoke out the exhaust is NOT normal.

KrispyKreme · Post by **KrispyKreme** » Wed Jun 18, 2014 11:38 am

Neurotic-Hapi-Snak wrote:Why not a 170i?

Price point.

BuddyRaton · Post by **BuddyRaton** » Wed Jun 18, 2014 11:48 am

KrispyKreme wrote:
Neurotic-Hapi-Snak wrote:Why not a 170i?

Price point.

I still think that the B125 is the best bang for the buck in a smaller displacement scooter.

TVB..your B50 has served you well!!! You probably have some of the highest mileage on one. After you get your B125 please give us a ride report and comparison.

Oh and we'll want photos too!

charlie55 · Post by **charlie55** » Wed Jun 18, 2014 1:12 pm

It may sound silly, but I imagine that your brain is going to have to re-learn that unconscious correlation between engine note and road speed.

TVB · Post by **TVB** » Wed Jun 18, 2014 1:59 pm

Neurotic-Hapi-Snak wrote:Why not a 170i?

Because a 125 is already more power than I need.

On a 4T, blue smoke out the exhaust is NOT normal.

I knew that.

TVB · Post by **TVB** » Wed Jun 18, 2014 2:02 pm

charlie55 wrote:It may sound silly, but I imagine that your brain is going to have to re-learn that unconscious correlation between engine note and road speed.

I'm sure you're right. The two roads I'm on the most (on my commute) have speed limits of 25mph and 35mph, and I know what those speeds* sound like on the Buddy 50. I'm going to have to look at the speedo more while I learn what they sound like on a 125.

*OK, really 30mph and 40mph. Just to keep up with traffic of course.

Syd · Post by **Syd** » Wed Jun 18, 2014 6:16 pm

I'm sorry Flash is getting old in the tooth, but congrats on the 125.

You're gonna get a ticket!

KrispyKreme · Post by **KrispyKreme** » Wed Jun 18, 2014 9:27 pm

How many miles does "Flash" have?

TVB · Post by **TVB** » Wed Jun 18, 2014 10:14 pm

Just shy of 24,000 miles.

KrispyKreme · Post by **KrispyKreme** » Wed Jun 18, 2014 10:53 pm

TVB wrote:Just shy of 24,000 miles.

Very impressive! My 150 is a bit over 15k. I intend on getting at least another 15k. I'll probably get another Buddy or another PGO product.