Engine noise, making me worried.
Engine noise, making me worried.
I just recently put my topend together and noticed that when wide open it seems to make some clattery noise, first i thought it was my worn out front sprocket, changed that and it didn't go away. Seems like it only does it in 4th or 5th, so am hoping its not something in the engine but i,m not sure. Took the rollers off and lubed them hoping it was those, noise is still there. It only happens when wide open or close to it, worried that its just gonna grenade sometime. Any assumption on things i should check or fix before something goes wrong.
I had porting done by gss and was wondering if my jetting should change. Right now its at #50 pilot, #170 main, its a Keihin PJ. Close to sea level.
I had porting done by gss and was wondering if my jetting should change. Right now its at #50 pilot, #170 main, its a Keihin PJ. Close to sea level.
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- Posts: 30
- Joined: March 14th, 2010, 4:52 pm
- Location: Fresno Calif
I think your main is way off. i just put my 01 back together with new stock bore with bridgeless gss porting. rad valve, pro circuit pipe, pj carb, 93 250 ign. ran it all weekend at Hollster Hills in Calif, 660 ft elevtion. got it sorted out, ended up with 58 pilot, dgn needle which is jut a hair lean on bottom clip, 185 main. 190 main neutered power. perfect running motor with sonoco 110 mixed 50/50 with 91 and 927 at 32-1.
- britincali
- Posts: 8207
- Joined: May 31st, 2007, 7:10 pm
- Location: Barstow, CA
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- Joined: July 4th, 2007, 6:57 pm
- 2strokekyle
- Posts: 58
- Joined: January 21st, 2010, 4:07 pm
- Location: Northern Utah
Thanks everyone, I think i'll change the jetting, if that doesn't help anything I move on to octane booster. I have no idea where to get anything besides 93 octane. I will warm the bike up change the plug out and try to get a benchmark plug reading before i start messing around with the jetting.
Do you think i need a new powerband.
Do you think i need a new powerband.
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- Posts: 678
- Joined: February 22nd, 2008, 8:18 pm
AvGas, 100+ octanekptkyle wrote:Thanks everyone, I think i'll change the jetting, if that doesn't help anything I move on to octane booster. I have no idea where to get anything besides 93 octane. I will warm the bike up change the plug out and try to get a benchmark plug reading before i start messing around with the jetting.
Do you think i need a new powerband.
I had to have the squish band on the head modified to continue running pump gas. My jetting seemed right. it would just heat up and start detonating under load. Sounded like bb's rattling around in the crank.kptkyle wrote:Thanks everyone, I think i'll change the jetting, if that doesn't help anything I move on to octane booster. I have no idea where to get anything besides 93 octane. I will warm the bike up change the plug out and try to get a benchmark plug reading before i start messing around with the jetting.
Do you think i need a new powerband.
No longer have a CR500.
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo
07 Yamaha YZ250, 17 Husqvarna 701 Enduro
Get on with riding or get on with dying.
https://www.youtube.com/mojoscojo