Planet Minis

arlindsay1992 · 08-28-2006, 10:14 AM

On my way back from the grocery store, I noticed the the engine was lacking power. On flat straight roads the revs would gradually fall. Even if I pinned the throttle it would keep falling. The only extra weight was a 2 liter bottle of soda. I just put in a CRF50 top and and a TBQ race cam without new springs. I have had it for about 100 miles now. 60-70 miles were done at full throttle on roads at about 40 mph. The carburetor has no choke and the backfire plate is removed from the airbox. I have a stock exhaust. What is causing the engine to not perform up to potential? My top speed fell from 43 to 37. That's a lot. Cars passed me a lot faster today.

arlindsay1992 · 08-28-2006, 10:21 AM

Thank for the suggestion. But I think I'll just fix my current motor.

Kurlon · 08-28-2006, 11:44 AM

Check the valves, if they tightened up you'll loose dynamic compression.

reynolds_brad · 08-28-2006, 12:27 PM

Quote:

Originally Posted by Dilligaf

G'Day,

buy a good quality Chinese knock-off engine! no probs!

LoL, you are a funny guy some times.

arlindsay1992 · 08-28-2006, 12:42 PM

I'll check the valves when the engine cools down. But only because it was last set with a soda can. I checked the ignition timing with agreat timing light. It's amazing how much it helps. I didn't need to check the point gap or anything. I just pulg it in and check the timing. It's awesome. If anyone has $90 to spare get one. It saved my life and possibly my bike's. It solved the snarly sound, bogging, lack of top end power, overheating, and it starts easier. It's just awesome. Here's a picture so you know what to put your money into. So thanks everyone for your help. Especially Dilligaf.

SprNtrl · 08-28-2006, 01:06 PM

Quote:

Originally Posted by studio65photos

where did you get it?

umm...Sears.

arlindsay1992 · 08-28-2006, 02:42 PM

Yeah. It says SEARS on the side of the tool.

arlindsay1992 · 08-28-2006, 02:47 PM

Oh. I lied. Okay, the engine starts better, doesn't snarl, and the bike runs cooler but it still won't rev high. I claimed all the stuff above after a 15 second ride around the yard and I never got above half throttle. In the troubleshooting section of my Honda shop manual, it says after checking the ignition timing, I should check the valve clearances. So I will when the engine is cool. I just went on a 20 mile trail ride and then did some dirt riding behind my sister's school so the engine is plenty warmed up.

arlindsay1992 · 08-28-2006, 02:49 PM

Yeah so I didn't post a question again. Can anyone tthink of another reason why the engine might perform bad at high RPMs? Actually, what would prevent the engine from getting to high RPMs?

dirtbkr188 · 08-28-2006, 05:24 PM

If it gets much slower, you might be able to get a bit part in a Comcast High Speed Internet commercial, it could be titled:

***************************qwokie & the Slowskys***********************************

arlindsay1992 · 08-28-2006, 06:33 PM

Thanks. Not helpful but makes me laugh.

dirtbkr188 · 08-28-2006, 06:50 PM

Did you get the oppurtunity to check your valve clearances ?

arlindsay1992 · 08-28-2006, 06:52 PM

Nope parents say I have to go to bed and the engine's probably still warm anyway. I'll check it tommorow morning.

jigracing · 08-28-2006, 09:04 PM

Hows the compression?

arlindsay1992 · 08-28-2006, 09:07 PM

120psi. Same as it's always been since I got in Chrstmas of 2004.

d0n · 08-29-2006, 06:21 AM

Quote:

Originally Posted by qwoke-q

120psi. Same as it's always been since I got in Chrstmas of 2004.

shouldn't u be in bed?

arlindsay1992 · 08-29-2006, 07:31 AM

I couldn't sleep. I drank a two liter bottle of Coke today. It was coming back from the store that I noticed the lack of high end power. I was crazy awake till about midnight. Oh. I'm going to go check the valves right now.

arlindsay1992 · 08-29-2006, 08:23 AM

I adjusted the valves to 0.002 inches. When my parents get home I can test it out.

arlindsay1992 · 08-29-2006, 01:18 PM

Well I had the valves adjusted but decided to take apart the shocks and paint them. So now I have to wait till noon tomorrow to assemble the shocks.

guardian327 · 08-29-2006, 03:58 PM

^^^ lol

08-28-2006, 10:14 AM	#1 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	My Z doesn't rev high anymore On my way back from the grocery store, I noticed the the engine was lacking power. On flat straight roads the revs would gradually fall. Even if I pinned the throttle it would keep falling. The only extra weight was a 2 liter bottle of soda. I just put in a CRF50 top and and a TBQ race cam without new springs. I have had it for about 100 miles now. 60-70 miles were done at full throttle on roads at about 40 mph. The carburetor has no choke and the backfire plate is removed from the airbox. I have a stock exhaust. What is causing the engine to not perform up to potential? My top speed fell from 43 to 37. That's a lot. Cars passed me a lot faster today.

08-28-2006, 09:04 PM	#14 (permalink)
jigracing Super Moderator Join Date: Jan 2004 Location: Hesperia, Ca Posts: 3,265 My Mood:	Hows the compression? __________________ Scott

08-28-2006, 10:21 AM	#2 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Thank for the suggestion. But I think I'll just fix my current motor.

08-28-2006, 11:44 AM	#3 (permalink)
Kurlon Super Moderator Join Date: Feb 2005 Location: Windham, ME Posts: 8,301	Check the valves, if they tightened up you'll loose dynamic compression.

08-28-2006, 12:42 PM	#5 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	I'll check the valves when the engine cools down. But only because it was last set with a soda can. I checked the ignition timing with agreat timing light. It's amazing how much it helps. I didn't need to check the point gap or anything. I just pulg it in and check the timing. It's awesome. If anyone has $90 to spare get one. It saved my life and possibly my bike's. It solved the snarly sound, bogging, lack of top end power, overheating, and it starts easier. It's just awesome. Here's a picture so you know what to put your money into. So thanks everyone for your help. Especially Dilligaf.

08-28-2006, 02:42 PM	#7 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Yeah. It says SEARS on the side of the tool.

08-28-2006, 02:47 PM	#8 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Oh. I lied. Okay, the engine starts better, doesn't snarl, and the bike runs cooler but it still won't rev high. I claimed all the stuff above after a 15 second ride around the yard and I never got above half throttle. In the troubleshooting section of my Honda shop manual, it says after checking the ignition timing, I should check the valve clearances. So I will when the engine is cool. I just went on a 20 mile trail ride and then did some dirt riding behind my sister's school so the engine is plenty warmed up.

08-28-2006, 02:49 PM	#9 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Yeah so I didn't post a question again. Can anyone tthink of another reason why the engine might perform bad at high RPMs? Actually, what would prevent the engine from getting to high RPMs?

08-28-2006, 05:24 PM	#10 (permalink)
dirtbkr188 3rd Gear Member Join Date: May 2004 Location: New Jersey Posts: 2,972	If it gets much slower, you might be able to get a bit part in a Comcast High Speed Internet commercial, it could be titled: *************************qwokie & the Slowskys*********************************

08-28-2006, 06:33 PM	#11 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Thanks. Not helpful but makes me laugh.

08-28-2006, 06:50 PM	#12 (permalink)
dirtbkr188 3rd Gear Member Join Date: May 2004 Location: New Jersey Posts: 2,972	Did you get the oppurtunity to check your valve clearances ?

08-28-2006, 06:52 PM	#13 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Nope parents say I have to go to bed and the engine's probably still warm anyway. I'll check it tommorow morning.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

08-28-2006, 09:07 PM	#15 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	120psi. Same as it's always been since I got in Chrstmas of 2004.

08-29-2006, 07:31 AM	#17 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	I couldn't sleep. I drank a two liter bottle of Coke today. It was coming back from the store that I noticed the lack of high end power. I was crazy awake till about midnight. Oh. I'm going to go check the valves right now.

08-29-2006, 08:23 AM	#18 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	I adjusted the valves to 0.002 inches. When my parents get home I can test it out.

08-29-2006, 01:18 PM	#19 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Well I had the valves adjusted but decided to take apart the shocks and paint them. So now I have to wait till noon tomorrow to assemble the shocks.

08-29-2006, 03:58 PM	#20 (permalink)
guardian327 2nd Gear Member Join Date: May 2006 Location: Camarillo, CA Posts: 387	^^^ lol