120ci?
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120ci?
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Hi, I am considering buying a UC with a Jim's 120ci Diamond cut fine motor. I've read some posts that said they had trouble with lifters/cam and front motor mounts. I asked the guy about it and he said he'd also had trouble and Jim replaced it. I'm definately familiar with the 110ci, but is the 120 a Harley motor or an S&S? I love the 6 spd tranny.
Thanks for any insight!
Hi, I am considering buying a UC with a Jim's 120ci Diamond cut fine motor. I've read some posts that said they had trouble with lifters/cam and front motor mounts. I asked the guy about it and he said he'd also had trouble and Jim replaced it. I'm definately familiar with the 110ci, but is the 120 a Harley motor or an S&S? I love the 6 spd tranny.
Thanks for any insight!
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From: Bedford UK
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Thank Graham for the welcome! So since it's neither Harley or S&S, I wonder how dependable the engines are. A guy in the classifieds has an 05 UC with 35,000 miles. Something with that much HP is great but wonder about durability.
Thanks for the help!
Thanks for the help!
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From: Bedford UK
It's a pleasure! It is possible that mileage is for the bike, but the engine was fitted later and has fewer miles on it. I'm not sure how long they have been available and it seems unlikely someone would buy a new bike and have a new 120 engine fitted before riding it away. As for durability, hopefully they are built with stronger parts than a stock Harley motor!
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He said he ordered it in 05 at the dealership. Then he said he ran it hard and they had lifter/cam problems that year which ruined his and Jim gave him another. So the miles may be off 1-2k miles. So it sure would be nice to know how dependable it is. It is loaded with 35,000 miles and looks showroom and the guy wants the pay off of $10,000.
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JIMS motors have beefier cases than stock HD cases. The reliability is going to come from how hard it was ridden, how well it was tuned, how much regular maintenance was done to it. If it was ridden somewhat responsibly (ie, minimal burnouts, wheelies, hole shots, etc) and was ran in a good state of tune with regular maintenance then I would say you should be fine. If not, then all bets off as with any engine. The JIMS 120's were not hp monsters although there is a lot of untapped potential in them. A cam swap and some head work can turn them into real rippers.
Good luck on whatever you decide.
Zach
Good luck on whatever you decide.
Zach
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Thanks for the info Zach. You have a great point and that is how it was ridden and maintained. The scary part is he said he dragged it when he first got it but took it easy when he got the new motor.
The price is $5k less than kbb, but maybe it would be smart to wait for one that's slower, low mileage and babied.
Thanks man!
The price is $5k less than kbb, but maybe it would be smart to wait for one that's slower, low mileage and babied.
Thanks man!
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"Seeker of Freedom"
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From: Kansas City Area
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is waiting to provide a racing enthusiast the opportunity to
go racing at an affordable price. T his engine is designed for
bolt-in installation in the Original E quipment-style chassis
of your track bike. N o special fabrication or engine-mount
relocation is required. T he crankcase, cylinders and heads
are painted black, and feature machined aluminum highlights
and chrome covers for a stunning show-and-go look.
When equipped with appropriate high-flow throttle body
and injectors, an open air induction, and tuned exhaust, this
engine is capable of producing a reliable 135+ horsepower
at the rear wheel.
Hand assembled alongside Harley-Davidsons production
T win Cam engines at the Pilgrim R oad E ngine Plant in
Milwaukee, these race-use engines feature only the finest
Screamin Eagle components:
4.060" big-bore cylinders.
4-5/8" stroke premium forged flywheels.
10.5:1 high-compression nickel-plated forged pistons with
T eflon coated skirts.
T itanium SST piston rings.
SE-266E high-lift cams.
Perfect Fit push rods +.030.
SE high-performance lifters.
CNC-ported MVA heads with automatic
compression release.
Machined lower rocker boxes for valve
spring collar clearance.
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Unique piston oilers for stroker clearances.
Screamin Eagle inner crankcase cam needle bearings.
Lefty high-performance crankcase output bearing.
High-performance torque response engine compensator.
SE Performance Spark Plugs.
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Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
Thanks for the info Zach. You have a great point and that is how it was ridden and maintained. The scary part is he said he dragged it when he first got it but took it easy when he got the new motor.
The price is $5k less than kbb, but maybe it would be smart to wait for one that's slower, low mileage and babied.
Thanks man!
The price is $5k less than kbb, but maybe it would be smart to wait for one that's slower, low mileage and babied.
Thanks man!
Deuces R Wild, I guess I should have said Harley didn't make a 120 until very recently!
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