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-   -   Newly build shovel motor grinds (https://www.v-twinforum.com/forums/pre-evolution-engines/538234-newly-build-shovel-motor-grinds.html)

JakeL 07-30-2018 12:15 AM

Newly build shovel motor grinds
 
I’m new here so I hope I’m posting this in the right place but I just got my bike running for the first time today. I believe it needs carb work because it won’t start unless the pilot screw is almost all the way out but what I’m really asking about is there seems to be a grinding noise coming from the primary side of the engine. I know the dry clutches tend to make noise but the bike was in neutral. If I can figure out how to post a video I will because it sounds awful. If anybody on here can give me an idea as to what it could be thatd be great.

Thermodyne 07-30-2018 08:39 AM

Chain rubbing on the primary would be one cause. Crank nut hitting the outer would be another.

Lefty bearing would be a real bad cause, and primary bearing would be not too big of a deal.

To many things that can cause left side noise to even make a good guess.

JakeL 07-30-2018 10:06 PM

Thanks for the info. It can’t be the nut or chain because it’s a belt drive open primary. I’ll check out the bearings but I just had the bottom end re done

pb68slab 08-04-2018 08:01 PM

Check to see the rear chain is not hitting the tranny 'ear' where the outer support bearing bolts on .

SteveB 04-14-2019 08:31 PM

The alternator/rotor could ne colliding

SteveB 04-14-2019 08:33 PM

Carb needs a bigger low speed jet

JayFL726 04-15-2019 04:15 AM

Quote:

Originally Posted by SteveB (Post 5882804)
Carb needs a bigger low speed jet

Agreed with this one but not sure is the only problem ..

SteveB 04-22-2019 05:32 AM

Yes, it could be a low fuel level in the float bowl too or only.

SteveB 04-22-2019 05:33 AM

The noise could be a loose rotor.

tall terry 04-22-2019 10:04 AM

what brand belt drive? some are prone to issues..

explain grind,,, as in when it grinds? some people call hard starting grinding.. just because the bottom end has been rebuilt,, doesnt mean its right,,, have you contacted the builder?
I have seen a good share of just rebuilt engines come through my shop that weren't done right.. nd had problems,,, shovel and evo bottom end rebuilds require expertise and a host of special tools and equipment...


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